Collections

Introduction

The Illuminate\Support\Collection class provides a fluent, convenient wrapper for working with arrays of data. For example, check out the following code. We'll use the collect helper to create a new collection instance from the array, run the strtoupper function on each element, and then remove all empty elements:

1$collection = collect(['taylor', 'abigail', null])->map(function ($name) {
2 return strtoupper($name);
3})->reject(function ($name) {
4 return empty($name);
5});
1$collection = collect(['taylor', 'abigail', null])->map(function ($name) {
2 return strtoupper($name);
3})->reject(function ($name) {
4 return empty($name);
5});

As you can see, the Collection class allows you to chain its methods to perform fluent mapping and reducing of the underlying array. In general, collections are immutable, meaning every Collection method returns an entirely new Collection instance.

Creating Collections

As mentioned above, the collect helper returns a new Illuminate\Support\Collection instance for the given array. So, creating a collection is as simple as:

1$collection = collect([1, 2, 3]);
1$collection = collect([1, 2, 3]);
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The results of Eloquent queries are always returned as Collection instances.

Extending Collections

Collections are "macroable", which allows you to add additional methods to the Collection class at run time. The Illuminate\Support\Collection class' macro method accepts a closure that will be executed when your macro is called. The macro closure may access the collection's other methods via $this, just as if it were a real method of the collection class. For example, the following code adds a toUpper method to the Collection class:

1use Illuminate\Support\Collection;
2use Illuminate\Support\Str;
3 
4Collection::macro('toUpper', function () {
5 return $this->map(function ($value) {
6 return Str::upper($value);
7 });
8});
9 
10$collection = collect(['first', 'second']);
11 
12$upper = $collection->toUpper();
13 
14// ['FIRST', 'SECOND']
1use Illuminate\Support\Collection;
2use Illuminate\Support\Str;
3 
4Collection::macro('toUpper', function () {
5 return $this->map(function ($value) {
6 return Str::upper($value);
7 });
8});
9 
10$collection = collect(['first', 'second']);
11 
12$upper = $collection->toUpper();
13 
14// ['FIRST', 'SECOND']

Typically, you should declare collection macros in the boot method of a service provider.

Macro Arguments

If necessary, you may define macros that accept additional arguments:

1use Illuminate\Support\Collection;
2use Illuminate\Support\Facades\Lang;
3 
4Collection::macro('toLocale', function ($locale) {
5 return $this->map(function ($value) use ($locale) {
6 return Lang::get($value, [], $locale);
7 });
8});
9 
10$collection = collect(['first', 'second']);
11 
12$translated = $collection->toLocale('es');
1use Illuminate\Support\Collection;
2use Illuminate\Support\Facades\Lang;
3 
4Collection::macro('toLocale', function ($locale) {
5 return $this->map(function ($value) use ($locale) {
6 return Lang::get($value, [], $locale);
7 });
8});
9 
10$collection = collect(['first', 'second']);
11 
12$translated = $collection->toLocale('es');

Available Methods

For the majority of the remaining collection documentation, we'll discuss each method available on the Collection class. Remember, all of these methods may be chained to fluently manipulate the underlying array. Furthermore, almost every method returns a new Collection instance, allowing you to preserve the original copy of the collection when necessary:

Method Listing

all()

The all method returns the underlying array represented by the collection:

1collect([1, 2, 3])->all();
2 
3// [1, 2, 3]
1collect([1, 2, 3])->all();
2 
3// [1, 2, 3]

average()

Alias for the avg method.

avg()

The avg method returns the average value of a given key:

1$average = collect([
2 ['foo' => 10],
3 ['foo' => 10],
4 ['foo' => 20],
5 ['foo' => 40]
6])->avg('foo');
7 
8// 20
9 
10$average = collect([1, 1, 2, 4])->avg();
11 
12// 2
1$average = collect([
2 ['foo' => 10],
3 ['foo' => 10],
4 ['foo' => 20],
5 ['foo' => 40]
6])->avg('foo');
7 
8// 20
9 
10$average = collect([1, 1, 2, 4])->avg();
11 
12// 2

chunk()

The chunk method breaks the collection into multiple, smaller collections of a given size:

1$collection = collect([1, 2, 3, 4, 5, 6, 7]);
2 
3$chunks = $collection->chunk(4);
4 
5$chunks->all();
6 
7// [[1, 2, 3, 4], [5, 6, 7]]
1$collection = collect([1, 2, 3, 4, 5, 6, 7]);
2 
3$chunks = $collection->chunk(4);
4 
5$chunks->all();
6 
7// [[1, 2, 3, 4], [5, 6, 7]]

This method is especially useful in views when working with a grid system such as Bootstrap. For example, imagine you have a collection of Eloquent models you want to display in a grid:

1@foreach ($products->chunk(3) as $chunk)
2 <div class="row">
3 @foreach ($chunk as $product)
4 <div class="col-xs-4">{{ $product->name }}</div>
5 @endforeach
6 </div>
7@endforeach
1@foreach ($products->chunk(3) as $chunk)
2 <div class="row">
3 @foreach ($chunk as $product)
4 <div class="col-xs-4">{{ $product->name }}</div>
5 @endforeach
6 </div>
7@endforeach

chunkWhile()

The chunkWhile method breaks the collection into multiple, smaller collections based on the evaluation of the given callback. The $chunk variable passed to the closure may be used to inspect the previous element:

1$collection = collect(str_split('AABBCCCD'));
2 
3$chunks = $collection->chunkWhile(function ($value, $key, $chunk) {
4 return $value === $chunk->last();
5});
6 
7$chunks->all();
8 
9// [['A', 'A'], ['B', 'B'], ['C', 'C', 'C'], ['D']]
1$collection = collect(str_split('AABBCCCD'));
2 
3$chunks = $collection->chunkWhile(function ($value, $key, $chunk) {
4 return $value === $chunk->last();
5});
6 
7$chunks->all();
8 
9// [['A', 'A'], ['B', 'B'], ['C', 'C', 'C'], ['D']]

collapse()

The collapse method collapses a collection of arrays into a single, flat collection:

1$collection = collect([
2 [1, 2, 3],
3 [4, 5, 6],
4 [7, 8, 9],
5]);
6 
7$collapsed = $collection->collapse();
8 
9$collapsed->all();
10 
11// [1, 2, 3, 4, 5, 6, 7, 8, 9]
1$collection = collect([
2 [1, 2, 3],
3 [4, 5, 6],
4 [7, 8, 9],
5]);
6 
7$collapsed = $collection->collapse();
8 
9$collapsed->all();
10 
11// [1, 2, 3, 4, 5, 6, 7, 8, 9]

collect()

The collect method returns a new Collection instance with the items currently in the collection:

1$collectionA = collect([1, 2, 3]);
2 
3$collectionB = $collectionA->collect();
4 
5$collectionB->all();
6 
7// [1, 2, 3]
1$collectionA = collect([1, 2, 3]);
2 
3$collectionB = $collectionA->collect();
4 
5$collectionB->all();
6 
7// [1, 2, 3]

The collect method is primarily useful for converting lazy collections into standard Collection instances:

1$lazyCollection = LazyCollection::make(function () {
2 yield 1;
3 yield 2;
4 yield 3;
5});
6 
7$collection = $lazyCollection->collect();
8 
9get_class($collection);
10 
11// 'Illuminate\Support\Collection'
12 
13$collection->all();
14 
15// [1, 2, 3]
1$lazyCollection = LazyCollection::make(function () {
2 yield 1;
3 yield 2;
4 yield 3;
5});
6 
7$collection = $lazyCollection->collect();
8 
9get_class($collection);
10 
11// 'Illuminate\Support\Collection'
12 
13$collection->all();
14 
15// [1, 2, 3]
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The collect method is especially useful when you have an instance of Enumerable and need a non-lazy collection instance. Since collect() is part of the Enumerable contract, you can safely use it to get a Collection instance.

combine()

The combine method combines the values of the collection, as keys, with the values of another array or collection:

1$collection = collect(['name', 'age']);
2 
3$combined = $collection->combine(['George', 29]);
4 
5$combined->all();
6 
7// ['name' => 'George', 'age' => 29]
1$collection = collect(['name', 'age']);
2 
3$combined = $collection->combine(['George', 29]);
4 
5$combined->all();
6 
7// ['name' => 'George', 'age' => 29]

concat()

The concat method appends the given array or collection's values onto the end of another collection:

1$collection = collect(['John Doe']);
2 
3$concatenated = $collection->concat(['Jane Doe'])->concat(['name' => 'Johnny Doe']);
4 
5$concatenated->all();
6 
7// ['John Doe', 'Jane Doe', 'Johnny Doe']
1$collection = collect(['John Doe']);
2 
3$concatenated = $collection->concat(['Jane Doe'])->concat(['name' => 'Johnny Doe']);
4 
5$concatenated->all();
6 
7// ['John Doe', 'Jane Doe', 'Johnny Doe']

The concat method numerically reindexes keys for items concatenated onto the original collection. To maintain keys in associative collections, see the merge method.

contains()

The contains method determines whether the collection contains a given item. You may pass a closure to the contains method to determine if an element exists in the collection matching a given truth test:

1$collection = collect([1, 2, 3, 4, 5]);
2 
3$collection->contains(function ($value, $key) {
4 return $value > 5;
5});
6 
7// false
1$collection = collect([1, 2, 3, 4, 5]);
2 
3$collection->contains(function ($value, $key) {
4 return $value > 5;
5});
6 
7// false

Alternatively, you may pass a string to the contains method to determine whether the collection contains a given item value:

1$collection = collect(['name' => 'Desk', 'price' => 100]);
2 
3$collection->contains('Desk');
4 
5// true
6 
7$collection->contains('New York');
8 
9// false
1$collection = collect(['name' => 'Desk', 'price' => 100]);
2 
3$collection->contains('Desk');
4 
5// true
6 
7$collection->contains('New York');
8 
9// false

You may also pass a key / value pair to the contains method, which will determine if the given pair exists in the collection:

1$collection = collect([
2 ['product' => 'Desk', 'price' => 200],
3 ['product' => 'Chair', 'price' => 100],
4]);
5 
6$collection->contains('product', 'Bookcase');
7 
8// false
1$collection = collect([
2 ['product' => 'Desk', 'price' => 200],
3 ['product' => 'Chair', 'price' => 100],
4]);
5 
6$collection->contains('product', 'Bookcase');
7 
8// false

The contains method uses "loose" comparisons when checking item values, meaning a string with an integer value will be considered equal to an integer of the same value. Use the containsStrict method to filter using "strict" comparisons.

For the inverse of contains, see the doesntContain method.

containsOneItem()

The containsOneItem method determines whether the collection contains a single item:

1collect([])->containsOneItem();
2 
3// false
4 
5collect(['1'])->containsOneItem();
6 
7// true
8 
9collect(['1', '2'])->containsOneItem();
10 
11// false
1collect([])->containsOneItem();
2 
3// false
4 
5collect(['1'])->containsOneItem();
6 
7// true
8 
9collect(['1', '2'])->containsOneItem();
10 
11// false

containsStrict()

This method has the same signature as the contains method; however, all values are compared using "strict" comparisons.

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This method's behavior is modified when using Eloquent Collections.

count()

The count method returns the total number of items in the collection:

1$collection = collect([1, 2, 3, 4]);
2 
3$collection->count();
4 
5// 4
1$collection = collect([1, 2, 3, 4]);
2 
3$collection->count();
4 
5// 4

countBy()

The countBy method counts the occurrences of values in the collection. By default, the method counts the occurrences of every element, allowing you to count certain "types" of elements in the collection:

1$collection = collect([1, 2, 2, 2, 3]);
2 
3$counted = $collection->countBy();
4 
5$counted->all();
6 
7// [1 => 1, 2 => 3, 3 => 1]
1$collection = collect([1, 2, 2, 2, 3]);
2 
3$counted = $collection->countBy();
4 
5$counted->all();
6 
7// [1 => 1, 2 => 3, 3 => 1]

You pass a closure to the countBy method to count all items by a custom value:

1$collection = collect(['[email protected]', '[email protected]', '[email protected]']);
2 
3$counted = $collection->countBy(function ($email) {
4 return substr(strrchr($email, "@"), 1);
5});
6 
7$counted->all();
8 
9// ['gmail.com' => 2, 'yahoo.com' => 1]
1$collection = collect(['[email protected]', '[email protected]', '[email protected]']);
2 
3$counted = $collection->countBy(function ($email) {
4 return substr(strrchr($email, "@"), 1);
5});
6 
7$counted->all();
8 
9// ['gmail.com' => 2, 'yahoo.com' => 1]

crossJoin()

The crossJoin method cross joins the collection's values among the given arrays or collections, returning a Cartesian product with all possible permutations:

1$collection = collect([1, 2]);
2 
3$matrix = $collection->crossJoin(['a', 'b']);
4 
5$matrix->all();
6 
7/*
8 [
9 [1, 'a'],
10 [1, 'b'],
11 [2, 'a'],
12 [2, 'b'],
13 ]
14*/
15 
16$collection = collect([1, 2]);
17 
18$matrix = $collection->crossJoin(['a', 'b'], ['I', 'II']);
19 
20$matrix->all();
21 
22/*
23 [
24 [1, 'a', 'I'],
25 [1, 'a', 'II'],
26 [1, 'b', 'I'],
27 [1, 'b', 'II'],
28 [2, 'a', 'I'],
29 [2, 'a', 'II'],
30 [2, 'b', 'I'],
31 [2, 'b', 'II'],
32 ]
33*/
1$collection = collect([1, 2]);
2 
3$matrix = $collection->crossJoin(['a', 'b']);
4 
5$matrix->all();
6 
7/*
8 [
9 [1, 'a'],
10 [1, 'b'],
11 [2, 'a'],
12 [2, 'b'],
13 ]
14*/
15 
16$collection = collect([1, 2]);
17 
18$matrix = $collection->crossJoin(['a', 'b'], ['I', 'II']);
19 
20$matrix->all();
21 
22/*
23 [
24 [1, 'a', 'I'],
25 [1, 'a', 'II'],
26 [1, 'b', 'I'],
27 [1, 'b', 'II'],
28 [2, 'a', 'I'],
29 [2, 'a', 'II'],
30 [2, 'b', 'I'],
31 [2, 'b', 'II'],
32 ]
33*/

dd()

The dd method dumps the collection's items and ends execution of the script:

1$collection = collect(['John Doe', 'Jane Doe']);
2 
3$collection->dd();
4 
5/*
6 Collection {
7 #items: array:2 [
8 0 => "John Doe"
9 1 => "Jane Doe"
10 ]
11 }
12*/
1$collection = collect(['John Doe', 'Jane Doe']);
2 
3$collection->dd();
4 
5/*
6 Collection {
7 #items: array:2 [
8 0 => "John Doe"
9 1 => "Jane Doe"
10 ]
11 }
12*/

If you do not want to stop executing the script, use the dump method instead.

diff()

The diff method compares the collection against another collection or a plain PHP array based on its values. This method will return the values in the original collection that are not present in the given collection:

1$collection = collect([1, 2, 3, 4, 5]);
2 
3$diff = $collection->diff([2, 4, 6, 8]);
4 
5$diff->all();
6 
7// [1, 3, 5]
1$collection = collect([1, 2, 3, 4, 5]);
2 
3$diff = $collection->diff([2, 4, 6, 8]);
4 
5$diff->all();
6 
7// [1, 3, 5]
lightbulb

This method's behavior is modified when using Eloquent Collections.

diffAssoc()

The diffAssoc method compares the collection against another collection or a plain PHP array based on its keys and values. This method will return the key / value pairs in the original collection that are not present in the given collection:

1$collection = collect([
2 'color' => 'orange',
3 'type' => 'fruit',
4 'remain' => 6,
5]);
6 
7$diff = $collection->diffAssoc([
8 'color' => 'yellow',
9 'type' => 'fruit',
10 'remain' => 3,
11 'used' => 6,
12]);
13 
14$diff->all();
15 
16// ['color' => 'orange', 'remain' => 6]
1$collection = collect([
2 'color' => 'orange',
3 'type' => 'fruit',
4 'remain' => 6,
5]);
6 
7$diff = $collection->diffAssoc([
8 'color' => 'yellow',
9 'type' => 'fruit',
10 'remain' => 3,
11 'used' => 6,
12]);
13 
14$diff->all();
15 
16// ['color' => 'orange', 'remain' => 6]

diffKeys()

The diffKeys method compares the collection against another collection or a plain PHP array based on its keys. This method will return the key / value pairs in the original collection that are not present in the given collection:

1$collection = collect([
2 'one' => 10,
3 'two' => 20,
4 'three' => 30,
5 'four' => 40,
6 'five' => 50,
7]);
8 
9$diff = $collection->diffKeys([
10 'two' => 2,
11 'four' => 4,
12 'six' => 6,
13 'eight' => 8,
14]);
15 
16$diff->all();
17 
18// ['one' => 10, 'three' => 30, 'five' => 50]
1$collection = collect([
2 'one' => 10,
3 'two' => 20,
4 'three' => 30,
5 'four' => 40,
6 'five' => 50,
7]);
8 
9$diff = $collection->diffKeys([
10 'two' => 2,
11 'four' => 4,
12 'six' => 6,
13 'eight' => 8,
14]);
15 
16$diff->all();
17 
18// ['one' => 10, 'three' => 30, 'five' => 50]

doesntContain()

The doesntContain method determines whether the collection does not contain a given item. You may pass a closure to the doesntContain method to determine if an element does not exist in the collection matching a given truth test:

1$collection = collect([1, 2, 3, 4, 5]);
2 
3$collection->doesntContain(function ($value, $key) {
4 return $value < 5;
5});
6 
7// false
1$collection = collect([1, 2, 3, 4, 5]);
2 
3$collection->doesntContain(function ($value, $key) {
4 return $value < 5;
5});
6 
7// false

Alternatively, you may pass a string to the doesntContain method to determine whether the collection does not contain a given item value:

1$collection = collect(['name' => 'Desk', 'price' => 100]);
2 
3$collection->doesntContain('Table');
4 
5// true
6 
7$collection->doesntContain('Desk');
8 
9// false
1$collection = collect(['name' => 'Desk', 'price' => 100]);
2 
3$collection->doesntContain('Table');
4 
5// true
6 
7$collection->doesntContain('Desk');
8 
9// false

You may also pass a key / value pair to the doesntContain method, which will determine if the given pair does not exist in the collection:

1$collection = collect([
2 ['product' => 'Desk', 'price' => 200],
3 ['product' => 'Chair', 'price' => 100],
4]);
5 
6$collection->doesntContain('product', 'Bookcase');
7 
8// true
1$collection = collect([
2 ['product' => 'Desk', 'price' => 200],
3 ['product' => 'Chair', 'price' => 100],
4]);
5 
6$collection->doesntContain('product', 'Bookcase');
7 
8// true

The doesntContain method uses "loose" comparisons when checking item values, meaning a string with an integer value will be considered equal to an integer of the same value.

dump()

The dump method dumps the collection's items:

1$collection = collect(['John Doe', 'Jane Doe']);
2 
3$collection->dump();
4 
5/*
6 Collection {
7 #items: array:2 [
8 0 => "John Doe"
9 1 => "Jane Doe"
10 ]
11 }
12*/
1$collection = collect(['John Doe', 'Jane Doe']);
2 
3$collection->dump();
4 
5/*
6 Collection {
7 #items: array:2 [
8 0 => "John Doe"
9 1 => "Jane Doe"
10 ]
11 }
12*/

If you want to stop executing the script after dumping the collection, use the dd method instead.

duplicates()

The duplicates method retrieves and returns duplicate values from the collection:

1$collection = collect(['a', 'b', 'a', 'c', 'b']);
2 
3$collection->duplicates();
4 
5// [2 => 'a', 4 => 'b']
1$collection = collect(['a', 'b', 'a', 'c', 'b']);
2 
3$collection->duplicates();
4 
5// [2 => 'a', 4 => 'b']

If the collection contains arrays or objects, you can pass the key of the attributes that you wish to check for duplicate values:

1$employees = collect([
2 ['email' => '[email protected]', 'position' => 'Developer'],
3 ['email' => '[email protected]', 'position' => 'Designer'],
4 ['email' => '[email protected]', 'position' => 'Developer'],
5]);
6 
7$employees->duplicates('position');
8 
9// [2 => 'Developer']
1$employees = collect([
2 ['email' => '[email protected]', 'position' => 'Developer'],
3 ['email' => '[email protected]', 'position' => 'Designer'],
4 ['email' => '[email protected]', 'position' => 'Developer'],
5]);
6 
7$employees->duplicates('position');
8 
9// [2 => 'Developer']

duplicatesStrict()

This method has the same signature as the duplicates method; however, all values are compared using "strict" comparisons.

each()

The each method iterates over the items in the collection and passes each item to a closure:

1$collection->each(function ($item, $key) {
2 //
3});
1$collection->each(function ($item, $key) {
2 //
3});

If you would like to stop iterating through the items, you may return false from your closure:

1$collection->each(function ($item, $key) {
2 if (/* condition */) {
3 return false;
4 }
5});
1$collection->each(function ($item, $key) {
2 if (/* condition */) {
3 return false;
4 }
5});

eachSpread()

The eachSpread method iterates over the collection's items, passing each nested item value into the given callback:

1$collection = collect([['John Doe', 35], ['Jane Doe', 33]]);
2 
3$collection->eachSpread(function ($name, $age) {
4 //
5});
1$collection = collect([['John Doe', 35], ['Jane Doe', 33]]);
2 
3$collection->eachSpread(function ($name, $age) {
4 //
5});

You may stop iterating through the items by returning false from the callback:

1$collection->eachSpread(function ($name, $age) {
2 return false;
3});
1$collection->eachSpread(function ($name, $age) {
2 return false;
3});

every()

The every method may be used to verify that all elements of a collection pass a given truth test:

1collect([1, 2, 3, 4])->every(function ($value, $key) {
2 return $value > 2;
3});
4 
5// false
1collect([1, 2, 3, 4])->every(function ($value, $key) {
2 return $value > 2;
3});
4 
5// false

If the collection is empty, the every method will return true:

1$collection = collect([]);
2 
3$collection->every(function ($value, $key) {
4 return $value > 2;
5});
6 
7// true
1$collection = collect([]);
2 
3$collection->every(function ($value, $key) {
4 return $value > 2;
5});
6 
7// true

except()

The except method returns all items in the collection except for those with the specified keys:

1$collection = collect(['product_id' => 1, 'price' => 100, 'discount' => false]);
2 
3$filtered = $collection->except(['price', 'discount']);
4 
5$filtered->all();
6 
7// ['product_id' => 1]
1$collection = collect(['product_id' => 1, 'price' => 100, 'discount' => false]);
2 
3$filtered = $collection->except(['price', 'discount']);
4 
5$filtered->all();
6 
7// ['product_id' => 1]

For the inverse of except, see the only method.

lightbulb

This method's behavior is modified when using Eloquent Collections.

filter()

The filter method filters the collection using the given callback, keeping only those items that pass a given truth test:

1$collection = collect([1, 2, 3, 4]);
2 
3$filtered = $collection->filter(function ($value, $key) {
4 return $value > 2;
5});
6 
7$filtered->all();
8 
9// [3, 4]
1$collection = collect([1, 2, 3, 4]);
2 
3$filtered = $collection->filter(function ($value, $key) {
4 return $value > 2;
5});
6 
7$filtered->all();
8 
9// [3, 4]

If no callback is supplied, all entries of the collection that are equivalent to false will be removed:

1$collection = collect([1, 2, 3, null, false, '', 0, []]);
2 
3$collection->filter()->all();
4 
5// [1, 2, 3]
1$collection = collect([1, 2, 3, null, false, '', 0, []]);
2 
3$collection->filter()->all();
4 
5// [1, 2, 3]

For the inverse of filter, see the reject method.

first()

The first method returns the first element in the collection that passes a given truth test:

1collect([1, 2, 3, 4])->first(function ($value, $key) {
2 return $value > 2;
3});
4 
5// 3
1collect([1, 2, 3, 4])->first(function ($value, $key) {
2 return $value > 2;
3});
4 
5// 3

You may also call the first method with no arguments to get the first element in the collection. If the collection is empty, null is returned:

1collect([1, 2, 3, 4])->first();
2 
3// 1
1collect([1, 2, 3, 4])->first();
2 
3// 1

firstOrFail()

The firstOrFail method is identical to the first method; however, if no result is found, an Illuminate\Support\ItemNotFoundException exception will be thrown:

1collect([1, 2, 3, 4])->firstOrFail(function ($value, $key) {
2 return $value > 5;
3});
4 
5// Throws ItemNotFoundException...
1collect([1, 2, 3, 4])->firstOrFail(function ($value, $key) {
2 return $value > 5;
3});
4 
5// Throws ItemNotFoundException...

You may also call the firstOrFail method with no arguments to get the first element in the collection. If the collection is empty, an Illuminate\Support\ItemNotFoundException exception will be thrown:

1collect([])->firstOrFail();
2 
3// Throws ItemNotFoundException...
1collect([])->firstOrFail();
2 
3// Throws ItemNotFoundException...

firstWhere()

The firstWhere method returns the first element in the collection with the given key / value pair:

1$collection = collect([
2 ['name' => 'Regena', 'age' => null],
3 ['name' => 'Linda', 'age' => 14],
4 ['name' => 'Diego', 'age' => 23],
5 ['name' => 'Linda', 'age' => 84],
6]);
7 
8$collection->firstWhere('name', 'Linda');
9 
10// ['name' => 'Linda', 'age' => 14]
1$collection = collect([
2 ['name' => 'Regena', 'age' => null],
3 ['name' => 'Linda', 'age' => 14],
4 ['name' => 'Diego', 'age' => 23],
5 ['name' => 'Linda', 'age' => 84],
6]);
7 
8$collection->firstWhere('name', 'Linda');
9 
10// ['name' => 'Linda', 'age' => 14]

You may also call the firstWhere method with a comparison operator:

1$collection->firstWhere('age', '>=', 18);
2 
3// ['name' => 'Diego', 'age' => 23]
1$collection->firstWhere('age', '>=', 18);
2 
3// ['name' => 'Diego', 'age' => 23]

Like the where method, you may pass one argument to the firstWhere method. In this scenario, the firstWhere method will return the first item where the given item key's value is "truthy":

1$collection->firstWhere('age');
2 
3// ['name' => 'Linda', 'age' => 14]
1$collection->firstWhere('age');
2 
3// ['name' => 'Linda', 'age' => 14]

flatMap()

The flatMap method iterates through the collection and passes each value to the given closure. The closure is free to modify the item and return it, thus forming a new collection of modified items. Then, the array is flattened by one level:

1$collection = collect([
2 ['name' => 'Sally'],
3 ['school' => 'Arkansas'],
4 ['age' => 28]
5]);
6 
7$flattened = $collection->flatMap(function ($values) {
8 return array_map('strtoupper', $values);
9});
10 
11$flattened->all();
12 
13// ['name' => 'SALLY', 'school' => 'ARKANSAS', 'age' => '28'];
1$collection = collect([
2 ['name' => 'Sally'],
3 ['school' => 'Arkansas'],
4 ['age' => 28]
5]);
6 
7$flattened = $collection->flatMap(function ($values) {
8 return array_map('strtoupper', $values);
9});
10 
11$flattened->all();
12 
13// ['name' => 'SALLY', 'school' => 'ARKANSAS', 'age' => '28'];

flatten()

The flatten method flattens a multi-dimensional collection into a single dimension:

1$collection = collect([
2 'name' => 'taylor',
3 'languages' => [
4 'php', 'javascript'
5 ]
6]);
7 
8$flattened = $collection->flatten();
9 
10$flattened->all();
11 
12// ['taylor', 'php', 'javascript'];
1$collection = collect([
2 'name' => 'taylor',
3 'languages' => [
4 'php', 'javascript'
5 ]
6]);
7 
8$flattened = $collection->flatten();
9 
10$flattened->all();
11 
12// ['taylor', 'php', 'javascript'];

If necessary, you may pass the flatten method a "depth" argument:

1$collection = collect([
2 'Apple' => [
3 [
4 'name' => 'iPhone 6S',
5 'brand' => 'Apple'
6 ],
7 ],
8 'Samsung' => [
9 [
10 'name' => 'Galaxy S7',
11 'brand' => 'Samsung'
12 ],
13 ],
14]);
15 
16$products = $collection->flatten(1);
17 
18$products->values()->all();
19 
20/*
21 [
22 ['name' => 'iPhone 6S', 'brand' => 'Apple'],
23 ['name' => 'Galaxy S7', 'brand' => 'Samsung'],
24 ]
25*/
1$collection = collect([
2 'Apple' => [
3 [
4 'name' => 'iPhone 6S',
5 'brand' => 'Apple'
6 ],
7 ],
8 'Samsung' => [
9 [
10 'name' => 'Galaxy S7',
11 'brand' => 'Samsung'
12 ],
13 ],
14]);
15 
16$products = $collection->flatten(1);
17 
18$products->values()->all();
19 
20/*
21 [
22 ['name' => 'iPhone 6S', 'brand' => 'Apple'],
23 ['name' => 'Galaxy S7', 'brand' => 'Samsung'],
24 ]
25*/

In this example, calling flatten without providing the depth would have also flattened the nested arrays, resulting in ['iPhone 6S', 'Apple', 'Galaxy S7', 'Samsung']. Providing a depth allows you to specify the number of levels nested arrays will be flattened.

flip()

The flip method swaps the collection's keys with their corresponding values:

1$collection = collect(['name' => 'taylor', 'framework' => 'laravel']);
2 
3$flipped = $collection->flip();
4 
5$flipped->all();
6 
7// ['taylor' => 'name', 'laravel' => 'framework']
1$collection = collect(['name' => 'taylor', 'framework' => 'laravel']);
2 
3$flipped = $collection->flip();
4 
5$flipped->all();
6 
7// ['taylor' => 'name', 'laravel' => 'framework']

forget()

The forget method removes an item from the collection by its key:

1$collection = collect(['name' => 'taylor', 'framework' => 'laravel']);
2 
3$collection->forget('name');
4 
5$collection->all();
6 
7// ['framework' => 'laravel']
1$collection = collect(['name' => 'taylor', 'framework' => 'laravel']);
2 
3$collection->forget('name');
4 
5$collection->all();
6 
7// ['framework' => 'laravel']
exclamation

Unlike most other collection methods, forget does not return a new modified collection; it modifies the collection it is called on.

forPage()

The forPage method returns a new collection containing the items that would be present on a given page number. The method accepts the page number as its first argument and the number of items to show per page as its second argument:

1$collection = collect([1, 2, 3, 4, 5, 6, 7, 8, 9]);
2 
3$chunk = $collection->forPage(2, 3);
4 
5$chunk->all();
6 
7// [4, 5, 6]
1$collection = collect([1, 2, 3, 4, 5, 6, 7, 8, 9]);
2 
3$chunk = $collection->forPage(2, 3);
4 
5$chunk->all();
6 
7// [4, 5, 6]

get()

The get method returns the item at a given key. If the key does not exist, null is returned:

1$collection = collect(['name' => 'taylor', 'framework' => 'laravel']);
2 
3$value = $collection->get('name');
4 
5// taylor
1$collection = collect(['name' => 'taylor', 'framework' => 'laravel']);
2 
3$value = $collection->get('name');
4 
5// taylor

You may optionally pass a default value as the second argument:

1$collection = collect(['name' => 'taylor', 'framework' => 'laravel']);
2 
3$value = $collection->get('age', 34);
4 
5// 34
1$collection = collect(['name' => 'taylor', 'framework' => 'laravel']);
2 
3$value = $collection->get('age', 34);
4 
5// 34

You may even pass a callback as the method's default value. The result of the callback will be returned if the specified key does not exist:

1$collection->get('email', function () {
2 return '[email protected]';
3});
4 
1$collection->get('email', function () {
2 return '[email protected]';
3});
4 

groupBy()

The groupBy method groups the collection's items by a given key:

1$collection = collect([
2 ['account_id' => 'account-x10', 'product' => 'Chair'],
3 ['account_id' => 'account-x10', 'product' => 'Bookcase'],
4 ['account_id' => 'account-x11', 'product' => 'Desk'],
5]);
6 
7$grouped = $collection->groupBy('account_id');
8 
9$grouped->all();
10 
11/*
12 [
13 'account-x10' => [
14 ['account_id' => 'account-x10', 'product' => 'Chair'],
15 ['account_id' => 'account-x10', 'product' => 'Bookcase'],
16 ],
17 'account-x11' => [
18 ['account_id' => 'account-x11', 'product' => 'Desk'],
19 ],
20 ]
21*/
1$collection = collect([
2 ['account_id' => 'account-x10', 'product' => 'Chair'],
3 ['account_id' => 'account-x10', 'product' => 'Bookcase'],
4 ['account_id' => 'account-x11', 'product' => 'Desk'],
5]);
6 
7$grouped = $collection->groupBy('account_id');
8 
9$grouped->all();
10 
11/*
12 [
13 'account-x10' => [
14 ['account_id' => 'account-x10', 'product' => 'Chair'],
15 ['account_id' => 'account-x10', 'product' => 'Bookcase'],
16 ],
17 'account-x11' => [
18 ['account_id' => 'account-x11', 'product' => 'Desk'],
19 ],
20 ]
21*/

Instead of passing a string key, you may pass a callback. The callback should return the value you wish to key the group by:

1$grouped = $collection->groupBy(function ($item, $key) {
2 return substr($item['account_id'], -3);
3});
4 
5$grouped->all();
6 
7/*
8 [
9 'x10' => [
10 ['account_id' => 'account-x10', 'product' => 'Chair'],
11 ['account_id' => 'account-x10', 'product' => 'Bookcase'],
12 ],
13 'x11' => [
14 ['account_id' => 'account-x11', 'product' => 'Desk'],
15 ],
16 ]
17*/
1$grouped = $collection->groupBy(function ($item, $key) {
2 return substr($item['account_id'], -3);
3});
4 
5$grouped->all();
6 
7/*
8 [
9 'x10' => [
10 ['account_id' => 'account-x10', 'product' => 'Chair'],
11 ['account_id' => 'account-x10', 'product' => 'Bookcase'],
12 ],
13 'x11' => [
14 ['account_id' => 'account-x11', 'product' => 'Desk'],
15 ],
16 ]
17*/

Multiple grouping criteria may be passed as an array. Each array element will be applied to the corresponding level within a multi-dimensional array:

1$data = new Collection([
2 10 => ['user' => 1, 'skill' => 1, 'roles' => ['Role_1', 'Role_3']],
3 20 => ['user' => 2, 'skill' => 1, 'roles' => ['Role_1', 'Role_2']],
4 30 => ['user' => 3, 'skill' => 2, 'roles' => ['Role_1']],
5 40 => ['user' => 4, 'skill' => 2, 'roles' => ['Role_2']],
6]);
7 
8$result = $data->groupBy(['skill', function ($item) {
9 return $item['roles'];
10}], preserveKeys: true);
11 
12/*
13[
14 1 => [
15 'Role_1' => [
16 10 => ['user' => 1, 'skill' => 1, 'roles' => ['Role_1', 'Role_3']],
17 20 => ['user' => 2, 'skill' => 1, 'roles' => ['Role_1', 'Role_2']],
18 ],
19 'Role_2' => [
20 20 => ['user' => 2, 'skill' => 1, 'roles' => ['Role_1', 'Role_2']],
21 ],
22 'Role_3' => [
23 10 => ['user' => 1, 'skill' => 1, 'roles' => ['Role_1', 'Role_3']],
24 ],
25 ],
26 2 => [
27 'Role_1' => [
28 30 => ['user' => 3, 'skill' => 2, 'roles' => ['Role_1']],
29 ],
30 'Role_2' => [
31 40 => ['user' => 4, 'skill' => 2, 'roles' => ['Role_2']],
32 ],
33 ],
34];
35*/
1$data = new Collection([
2 10 => ['user' => 1, 'skill' => 1, 'roles' => ['Role_1', 'Role_3']],
3 20 => ['user' => 2, 'skill' => 1, 'roles' => ['Role_1', 'Role_2']],
4 30 => ['user' => 3, 'skill' => 2, 'roles' => ['Role_1']],
5 40 => ['user' => 4, 'skill' => 2, 'roles' => ['Role_2']],
6]);
7 
8$result = $data->groupBy(['skill', function ($item) {
9 return $item['roles'];
10}], preserveKeys: true);
11 
12/*
13[
14 1 => [
15 'Role_1' => [
16 10 => ['user' => 1, 'skill' => 1, 'roles' => ['Role_1', 'Role_3']],
17 20 => ['user' => 2, 'skill' => 1, 'roles' => ['Role_1', 'Role_2']],
18 ],
19 'Role_2' => [
20 20 => ['user' => 2, 'skill' => 1, 'roles' => ['Role_1', 'Role_2']],
21 ],
22 'Role_3' => [
23 10 => ['user' => 1, 'skill' => 1, 'roles' => ['Role_1', 'Role_3']],
24 ],
25 ],
26 2 => [
27 'Role_1' => [
28 30 => ['user' => 3, 'skill' => 2, 'roles' => ['Role_1']],
29 ],
30 'Role_2' => [
31 40 => ['user' => 4, 'skill' => 2, 'roles' => ['Role_2']],
32 ],
33 ],
34];
35*/

has()

The has method determines if a given key exists in the collection:

1$collection = collect(['account_id' => 1, 'product' => 'Desk', 'amount' => 5]);
2 
3$collection->has('product');
4 
5// true
6 
7$collection->has(['product', 'amount']);
8 
9// true
10 
11$collection->has(['amount', 'price']);
12 
13// false
1$collection = collect(['account_id' => 1, 'product' => 'Desk', 'amount' => 5]);
2 
3$collection->has('product');
4 
5// true
6 
7$collection->has(['product', 'amount']);
8 
9// true
10 
11$collection->has(['amount', 'price']);
12 
13// false

hasAny()

The hasAny method determines whether any of the given keys exist in the collection:

1$collection = collect(['account_id' => 1, 'product' => 'Desk', 'amount' => 5]);
2 
3$collection->hasAny(['product', 'price']);
4 
5// true
6 
7$collection->hasAny(['name', 'price']);
8 
9// false
1$collection = collect(['account_id' => 1, 'product' => 'Desk', 'amount' => 5]);
2 
3$collection->hasAny(['product', 'price']);
4 
5// true
6 
7$collection->hasAny(['name', 'price']);
8 
9// false

implode()

The implode method joins items in a collection. Its arguments depend on the type of items in the collection. If the collection contains arrays or objects, you should pass the key of the attributes you wish to join, and the "glue" string you wish to place between the values:

1$collection = collect([
2 ['account_id' => 1, 'product' => 'Desk'],
3 ['account_id' => 2, 'product' => 'Chair'],
4]);
5 
6$collection->implode('product', ', ');
7 
8// Desk, Chair
1$collection = collect([
2 ['account_id' => 1, 'product' => 'Desk'],
3 ['account_id' => 2, 'product' => 'Chair'],
4]);
5 
6$collection->implode('product', ', ');
7 
8// Desk, Chair

If the collection contains simple strings or numeric values, you should pass the "glue" as the only argument to the method:

1collect([1, 2, 3, 4, 5])->implode('-');
2 
3// '1-2-3-4-5'
1collect([1, 2, 3, 4, 5])->implode('-');
2 
3// '1-2-3-4-5'

You may pass a closure to the implode method if you would like to format the values being imploded:

1$collection->implode(function ($item, $key) {
2 return strtoupper($item['product']);
3}, ', ');
4 
5// DESK, CHAIR
1$collection->implode(function ($item, $key) {
2 return strtoupper($item['product']);
3}, ', ');
4 
5// DESK, CHAIR

intersect()

The intersect method removes any values from the original collection that are not present in the given array or collection. The resulting collection will preserve the original collection's keys:

1$collection = collect(['Desk', 'Sofa', 'Chair']);
2 
3$intersect = $collection->intersect(['Desk', 'Chair', 'Bookcase']);
4 
5$intersect->all();
6 
7// [0 => 'Desk', 2 => 'Chair']
1$collection = collect(['Desk', 'Sofa', 'Chair']);
2 
3$intersect = $collection->intersect(['Desk', 'Chair', 'Bookcase']);
4 
5$intersect->all();
6 
7// [0 => 'Desk', 2 => 'Chair']
lightbulb

This method's behavior is modified when using Eloquent Collections.

intersectByKeys()

The intersectByKeys method removes any keys and their corresponding values from the original collection that are not present in the given array or collection:

1$collection = collect([
2 'serial' => 'UX301', 'type' => 'screen', 'year' => 2009,
3]);
4 
5$intersect = $collection->intersectByKeys([
6 'reference' => 'UX404', 'type' => 'tab', 'year' => 2011,
7]);
8 
9$intersect->all();
10 
11// ['type' => 'screen', 'year' => 2009]
1$collection = collect([
2 'serial' => 'UX301', 'type' => 'screen', 'year' => 2009,
3]);
4 
5$intersect = $collection->intersectByKeys([
6 'reference' => 'UX404', 'type' => 'tab', 'year' => 2011,
7]);
8 
9$intersect->all();
10 
11// ['type' => 'screen', 'year' => 2009]

isEmpty()

The isEmpty method returns true if the collection is empty; otherwise, false is returned:

1collect([])->isEmpty();
2 
3// true
1collect([])->isEmpty();
2 
3// true

isNotEmpty()

The isNotEmpty method returns true if the collection is not empty; otherwise, false is returned:

1collect([])->isNotEmpty();
2 
3// false
1collect([])->isNotEmpty();
2 
3// false

join()

The join method joins the collection's values with a string. Using this method's second argument, you may also specify how the final element should be appended to the string:

1collect(['a', 'b', 'c'])->join(', '); // 'a, b, c'
2collect(['a', 'b', 'c'])->join(', ', ', and '); // 'a, b, and c'
3collect(['a', 'b'])->join(', ', ' and '); // 'a and b'
4collect(['a'])->join(', ', ' and '); // 'a'
5collect([])->join(', ', ' and '); // ''
1collect(['a', 'b', 'c'])->join(', '); // 'a, b, c'
2collect(['a', 'b', 'c'])->join(', ', ', and '); // 'a, b, and c'
3collect(['a', 'b'])->join(', ', ' and '); // 'a and b'
4collect(['a'])->join(', ', ' and '); // 'a'
5collect([])->join(', ', ' and '); // ''

keyBy()

The keyBy method keys the collection by the given key. If multiple items have the same key, only the last one will appear in the new collection:

1$collection = collect([
2 ['product_id' => 'prod-100', 'name' => 'Desk'],
3 ['product_id' => 'prod-200', 'name' => 'Chair'],
4]);
5 
6$keyed = $collection->keyBy('product_id');
7 
8$keyed->all();
9 
10/*
11 [
12 'prod-100' => ['product_id' => 'prod-100', 'name' => 'Desk'],
13 'prod-200' => ['product_id' => 'prod-200', 'name' => 'Chair'],
14 ]
15*/
1$collection = collect([
2 ['product_id' => 'prod-100', 'name' => 'Desk'],
3 ['product_id' => 'prod-200', 'name' => 'Chair'],
4]);
5 
6$keyed = $collection->keyBy('product_id');
7 
8$keyed->all();
9 
10/*
11 [
12 'prod-100' => ['product_id' => 'prod-100', 'name' => 'Desk'],
13 'prod-200' => ['product_id' => 'prod-200', 'name' => 'Chair'],
14 ]
15*/

You may also pass a callback to the method. The callback should return the value to key the collection by:

1$keyed = $collection->keyBy(function ($item, $key) {
2 return strtoupper($item['product_id']);
3});
4 
5$keyed->all();
6 
7/*
8 [
9 'PROD-100' => ['product_id' => 'prod-100', 'name' => 'Desk'],
10 'PROD-200' => ['product_id' => 'prod-200', 'name' => 'Chair'],
11 ]
12*/
1$keyed = $collection->keyBy(function ($item, $key) {
2 return strtoupper($item['product_id']);
3});
4 
5$keyed->all();
6 
7/*
8 [
9 'PROD-100' => ['product_id' => 'prod-100', 'name' => 'Desk'],
10 'PROD-200' => ['product_id' => 'prod-200', 'name' => 'Chair'],
11 ]
12*/

keys()

The keys method returns all of the collection's keys:

1$collection = collect([
2 'prod-100' => ['product_id' => 'prod-100', 'name' => 'Desk'],
3 'prod-200' => ['product_id' => 'prod-200', 'name' => 'Chair'],
4]);
5 
6$keys = $collection->keys();
7 
8$keys->all();
9 
10// ['prod-100', 'prod-200']
1$collection = collect([
2 'prod-100' => ['product_id' => 'prod-100', 'name' => 'Desk'],
3 'prod-200' => ['product_id' => 'prod-200', 'name' => 'Chair'],
4]);
5 
6$keys = $collection->keys();
7 
8$keys->all();
9 
10// ['prod-100', 'prod-200']

last()

The last method returns the last element in the collection that passes a given truth test:

1collect([1, 2, 3, 4])->last(function ($value, $key) {
2 return $value < 3;
3});
4 
5// 2
1collect([1, 2, 3, 4])->last(function ($value, $key) {
2 return $value < 3;
3});
4 
5// 2

You may also call the last method with no arguments to get the last element in the collection. If the collection is empty, null is returned:

1collect([1, 2, 3, 4])->last();
2 
3// 4
1collect([1, 2, 3, 4])->last();
2 
3// 4

lazy()

The lazy method returns a new LazyCollection instance from the underlying array of items:

1$lazyCollection = collect([1, 2, 3, 4])->lazy();
2 
3get_class($lazyCollection);
4 
5// Illuminate\Support\LazyCollection
6 
7$lazyCollection->all();
8 
9// [1, 2, 3, 4]
1$lazyCollection = collect([1, 2, 3, 4])->lazy();
2 
3get_class($lazyCollection);
4 
5// Illuminate\Support\LazyCollection
6 
7$lazyCollection->all();
8 
9// [1, 2, 3, 4]

This is especially useful when you need to perform transformations on a huge Collection that contains many items:

1$count = $hugeCollection
2 ->lazy()
3 ->where('country', 'FR')
4 ->where('balance', '>', '100')
5 ->count();
1$count = $hugeCollection
2 ->lazy()
3 ->where('country', 'FR')
4 ->where('balance', '>', '100')
5 ->count();

By converting the collection to a LazyCollection, we avoid having to allocate a ton of additional memory. Though the original collection still keeps its values in memory, the subsequent filters will not. Therefore, virtually no additional memory will be allocated when filtering the collection's results.

macro()

The static macro method allows you to add methods to the Collection class at run time. Refer to the documentation on extending collections for more information.

make()

The static make method creates a new collection instance. See the Creating Collections section.

map()

The map method iterates through the collection and passes each value to the given callback. The callback is free to modify the item and return it, thus forming a new collection of modified items:

1$collection = collect([1, 2, 3, 4, 5]);
2 
3$multiplied = $collection->map(function ($item, $key) {
4 return $item * 2;
5});
6 
7$multiplied->all();
8 
9// [2, 4, 6, 8, 10]
1$collection = collect([1, 2, 3, 4, 5]);
2 
3$multiplied = $collection->map(function ($item, $key) {
4 return $item * 2;
5});
6 
7$multiplied->all();
8 
9// [2, 4, 6, 8, 10]
exclamation

Like most other collection methods, map returns a new collection instance; it does not modify the collection it is called on. If you want to transform the original collection, use the transform method.

mapInto()

The mapInto() method iterates over the collection, creating a new instance of the given class by passing the value into the constructor:

1class Currency
2{
3 /**
4 * Create a new currency instance.
5 *
6 * @param string $code
7 * @return void
8 */
9 function __construct(string $code)
10 {
11 $this->code = $code;
12 }
13}
14 
15$collection = collect(['USD', 'EUR', 'GBP']);
16 
17$currencies = $collection->mapInto(Currency::class);
18 
19$currencies->all();
20 
21// [Currency('USD'), Currency('EUR'), Currency('GBP')]
1class Currency
2{
3 /**
4 * Create a new currency instance.
5 *
6 * @param string $code
7 * @return void
8 */
9 function __construct(string $code)
10 {
11 $this->code = $code;
12 }
13}
14 
15$collection = collect(['USD', 'EUR', 'GBP']);
16 
17$currencies = $collection->mapInto(Currency::class);
18 
19$currencies->all();
20 
21// [Currency('USD'), Currency('EUR'), Currency('GBP')]

mapSpread()

The mapSpread method iterates over the collection's items, passing each nested item value into the given closure. The closure is free to modify the item and return it, thus forming a new collection of modified items:

1$collection = collect([0, 1, 2, 3, 4, 5, 6, 7, 8, 9]);
2 
3$chunks = $collection->chunk(2);
4 
5$sequence = $chunks->mapSpread(function ($even, $odd) {
6 return $even + $odd;
7});
8 
9$sequence->all();
10 
11// [1, 5, 9, 13, 17]
1$collection = collect([0, 1, 2, 3, 4, 5, 6, 7, 8, 9]);
2 
3$chunks = $collection->chunk(2);
4 
5$sequence = $chunks->mapSpread(function ($even, $odd) {
6 return $even + $odd;
7});
8 
9$sequence->all();
10 
11// [1, 5, 9, 13, 17]

mapToGroups()

The mapToGroups method groups the collection's items by the given closure. The closure should return an associative array containing a single key / value pair, thus forming a new collection of grouped values:

1$collection = collect([
2 [
3 'name' => 'John Doe',
4 'department' => 'Sales',
5 ],
6 [
7 'name' => 'Jane Doe',
8 'department' => 'Sales',
9 ],
10 [
11 'name' => 'Johnny Doe',
12 'department' => 'Marketing',
13 ]
14]);
15 
16$grouped = $collection->mapToGroups(function ($item, $key) {
17 return [$item['department'] => $item['name']];
18});
19 
20$grouped->all();
21 
22/*
23 [
24 'Sales' => ['John Doe', 'Jane Doe'],
25 'Marketing' => ['Johnny Doe'],
26 ]
27*/
28 
29$grouped->get('Sales')->all();
30 
31// ['John Doe', 'Jane Doe']
1$collection = collect([
2 [
3 'name' => 'John Doe',
4 'department' => 'Sales',
5 ],
6 [
7 'name' => 'Jane Doe',
8 'department' => 'Sales',
9 ],
10 [
11 'name' => 'Johnny Doe',
12 'department' => 'Marketing',
13 ]
14]);
15 
16$grouped = $collection->mapToGroups(function ($item, $key) {
17 return [$item['department'] => $item['name']];
18});
19 
20$grouped->all();
21 
22/*
23 [
24 'Sales' => ['John Doe', 'Jane Doe'],
25 'Marketing' => ['Johnny Doe'],
26 ]
27*/
28 
29$grouped->get('Sales')->all();
30 
31// ['John Doe', 'Jane Doe']

mapWithKeys()

The mapWithKeys method iterates through the collection and passes each value to the given callback. The callback should return an associative array containing a single key / value pair:

1$collection = collect([
2 [
3 'name' => 'John',
4 'department' => 'Sales',
5 'email' => '[email protected]',
6 ],
7 [
8 'name' => 'Jane',
9 'department' => 'Marketing',
10 'email' => '[email protected]',
11 ]
12]);
13 
14$keyed = $collection->mapWithKeys(function ($item, $key) {
15 return [$item['email'] => $item['name']];
16});
17 
18$keyed->all();
19 
20/*
21 [
22 '[email protected]' => 'John',
23 '[email protected]' => 'Jane',
24 ]
25*/
1$collection = collect([
2 [
3 'name' => 'John',
4 'department' => 'Sales',
5 'email' => '[email protected]',
6 ],
7 [
8 'name' => 'Jane',
9 'department' => 'Marketing',
10 'email' => '[email protected]',
11 ]
12]);
13 
14$keyed = $collection->mapWithKeys(function ($item, $key) {
15 return [$item['email'] => $item['name']];
16});
17 
18$keyed->all();
19 
20/*
21 [
22 '[email protected]' => 'John',
23 '[email protected]' => 'Jane',
24 ]
25*/

max()

The max method returns the maximum value of a given key:

1$max = collect([
2 ['foo' => 10],
3 ['foo' => 20]
4])->max('foo');
5 
6// 20
7 
8$max = collect([1, 2, 3, 4, 5])->max();
9 
10// 5
1$max = collect([
2 ['foo' => 10],
3 ['foo' => 20]
4])->max('foo');
5 
6// 20
7 
8$max = collect([1, 2, 3, 4, 5])->max();
9 
10// 5

median()

The median method returns the median value of a given key:

1$median = collect([
2 ['foo' => 10],
3 ['foo' => 10],
4 ['foo' => 20],
5 ['foo' => 40]
6])->median('foo');
7 
8// 15
9 
10$median = collect([1, 1, 2, 4])->median();
11 
12// 1.5
1$median = collect([
2 ['foo' => 10],
3 ['foo' => 10],
4 ['foo' => 20],
5 ['foo' => 40]
6])->median('foo');
7 
8// 15
9 
10$median = collect([1, 1, 2, 4])->median();
11 
12// 1.5

merge()

The merge method merges the given array or collection with the original collection. If a string key in the given items matches a string key in the original collection, the given item's value will overwrite the value in the original collection:

1$collection = collect(['product_id' => 1, 'price' => 100]);
2 
3$merged = $collection->merge(['price' => 200, 'discount' => false]);
4 
5$merged->all();
6 
7// ['product_id' => 1, 'price' => 200, 'discount' => false]
1$collection = collect(['product_id' => 1, 'price' => 100]);
2 
3$merged = $collection->merge(['price' => 200, 'discount' => false]);
4 
5$merged->all();
6 
7// ['product_id' => 1, 'price' => 200, 'discount' => false]

If the given item's keys are numeric, the values will be appended to the end of the collection:

1$collection = collect(['Desk', 'Chair']);
2 
3$merged = $collection->merge(['Bookcase', 'Door']);
4 
5$merged->all();
6 
7// ['Desk', 'Chair', 'Bookcase', 'Door']
1$collection = collect(['Desk', 'Chair']);
2 
3$merged = $collection->merge(['Bookcase', 'Door']);
4 
5$merged->all();
6 
7// ['Desk', 'Chair', 'Bookcase', 'Door']

mergeRecursive()

The mergeRecursive method merges the given array or collection recursively with the original collection. If a string key in the given items matches a string key in the original collection, then the values for these keys are merged together into an array, and this is done recursively:

1$collection = collect(['product_id' => 1, 'price' => 100]);
2 
3$merged = $collection->mergeRecursive([
4 'product_id' => 2,
5 'price' => 200,
6 'discount' => false
7]);
8 
9$merged->all();
10 
11// ['product_id' => [1, 2], 'price' => [100, 200], 'discount' => false]
1$collection = collect(['product_id' => 1, 'price' => 100]);
2 
3$merged = $collection->mergeRecursive([
4 'product_id' => 2,
5 'price' => 200,
6 'discount' => false
7]);
8 
9$merged->all();
10 
11// ['product_id' => [1, 2], 'price' => [100, 200], 'discount' => false]

min()

The min method returns the minimum value of a given key:

1$min = collect([['foo' => 10], ['foo' => 20]])->min('foo');
2 
3// 10
4 
5$min = collect([1, 2, 3, 4, 5])->min();
6 
7// 1
1$min = collect([['foo' => 10], ['foo' => 20]])->min('foo');
2 
3// 10
4 
5$min = collect([1, 2, 3, 4, 5])->min();
6 
7// 1

mode()

The mode method returns the mode value of a given key:

1$mode = collect([
2 ['foo' => 10],
3 ['foo' => 10],
4 ['foo' => 20],
5 ['foo' => 40]
6])->mode('foo');
7 
8// [10]
9 
10$mode = collect([1, 1, 2, 4])->mode();
11 
12// [1]
13 
14$mode = collect([1, 1, 2, 2])->mode();
15 
16// [1, 2]
1$mode = collect([
2 ['foo' => 10],
3 ['foo' => 10],
4 ['foo' => 20],
5 ['foo' => 40]
6])->mode('foo');
7 
8// [10]
9 
10$mode = collect([1, 1, 2, 4])->mode();
11 
12// [1]
13 
14$mode = collect([1, 1, 2, 2])->mode();
15 
16// [1, 2]

nth()

The nth method creates a new collection consisting of every n-th element:

1$collection = collect(['a', 'b', 'c', 'd', 'e', 'f']);
2 
3$collection->nth(4);
4 
5// ['a', 'e']
1$collection = collect(['a', 'b', 'c', 'd', 'e', 'f']);
2 
3$collection->nth(4);
4 
5// ['a', 'e']

You may optionally pass a starting offset as the second argument:

1$collection->nth(4, 1);
2 
3// ['b', 'f']
1$collection->nth(4, 1);
2 
3// ['b', 'f']

only()

The only method returns the items in the collection with the specified keys:

1$collection = collect([
2 'product_id' => 1,
3 'name' => 'Desk',
4 'price' => 100,
5 'discount' => false
6]);
7 
8$filtered = $collection->only(['product_id', 'name']);
9 
10$filtered->all();
11 
12// ['product_id' => 1, 'name' => 'Desk']
1$collection = collect([
2 'product_id' => 1,
3 'name' => 'Desk',
4 'price' => 100,
5 'discount' => false
6]);
7 
8$filtered = $collection->only(['product_id', 'name']);
9 
10$filtered->all();
11 
12// ['product_id' => 1, 'name' => 'Desk']

For the inverse of only, see the except method.

lightbulb

This method's behavior is modified when using Eloquent Collections.

pad()

The pad method will fill the array with the given value until the array reaches the specified size. This method behaves like the array_pad PHP function.

To pad to the left, you should specify a negative size. No padding will take place if the absolute value of the given size is less than or equal to the length of the array:

1$collection = collect(['A', 'B', 'C']);
2 
3$filtered = $collection->pad(5, 0);
4 
5$filtered->all();
6 
7// ['A', 'B', 'C', 0, 0]
8 
9$filtered = $collection->pad(-5, 0);
10 
11$filtered->all();
12 
13// [0, 0, 'A', 'B', 'C']
1$collection = collect(['A', 'B', 'C']);
2 
3$filtered = $collection->pad(5, 0);
4 
5$filtered->all();
6 
7// ['A', 'B', 'C', 0, 0]
8 
9$filtered = $collection->pad(-5, 0);
10 
11$filtered->all();
12 
13// [0, 0, 'A', 'B', 'C']

partition()

The partition method may be combined with PHP array destructuring to separate elements that pass a given truth test from those that do not:

1$collection = collect([1, 2, 3, 4, 5, 6]);
2 
3[$underThree, $equalOrAboveThree] = $collection->partition(function ($i) {
4 return $i < 3;
5});
6 
7$underThree->all();
8 
9// [1, 2]
10 
11$equalOrAboveThree->all();
12 
13// [3, 4, 5, 6]
1$collection = collect([1, 2, 3, 4, 5, 6]);
2 
3[$underThree, $equalOrAboveThree] = $collection->partition(function ($i) {
4 return $i < 3;
5});
6 
7$underThree->all();
8 
9// [1, 2]
10 
11$equalOrAboveThree->all();
12 
13// [3, 4, 5, 6]

pipe()

The pipe method passes the collection to the given closure and returns the result of the executed closure:

1$collection = collect([1, 2, 3]);
2 
3$piped = $collection->pipe(function ($collection) {
4 return $collection->sum();
5});
6 
7// 6
1$collection = collect([1, 2, 3]);
2 
3$piped = $collection->pipe(function ($collection) {
4 return $collection->sum();
5});
6 
7// 6

pipeInto()

The pipeInto method creates a new instance of the given class and passes the collection into the constructor:

1class ResourceCollection
2{
3 /**
4 * The Collection instance.
5 */
6 public $collection;
7 
8 /**
9 * Create a new ResourceCollection instance.
10 *
11 * @param Collection $collection
12 * @return void
13 */
14 public function __construct(Collection $collection)
15 {
16 $this->collection = $collection;
17 }
18}
19 
20$collection = collect([1, 2, 3]);
21 
22$resource = $collection->pipeInto(ResourceCollection::class);
23 
24$resource->collection->all();
25 
26// [1, 2, 3]
1class ResourceCollection
2{
3 /**
4 * The Collection instance.
5 */
6 public $collection;
7 
8 /**
9 * Create a new ResourceCollection instance.
10 *
11 * @param Collection $collection
12 * @return void
13 */
14 public function __construct(Collection $collection)
15 {
16 $this->collection = $collection;
17 }
18}
19 
20$collection = collect([1, 2, 3]);
21 
22$resource = $collection->pipeInto(ResourceCollection::class);
23 
24$resource->collection->all();
25 
26// [1, 2, 3]

pipeThrough()

The pipeThrough method passes the collection to the given array of closures and returns the result of the executed closures:

1$collection = collect([1, 2, 3]);
2 
3$result = $collection->pipeThrough([
4 function ($collection) {
5 return $collection->merge([4, 5]);
6 },
7 function ($collection) {
8 return $collection->sum();
9 },
10]);
11 
12// 15
1$collection = collect([1, 2, 3]);
2 
3$result = $collection->pipeThrough([
4 function ($collection) {
5 return $collection->merge([4, 5]);
6 },
7 function ($collection) {
8 return $collection->sum();
9 },
10]);
11 
12// 15

pluck()

The pluck method retrieves all of the values for a given key:

1$collection = collect([
2 ['product_id' => 'prod-100', 'name' => 'Desk'],
3 ['product_id' => 'prod-200', 'name' => 'Chair'],
4]);
5 
6$plucked = $collection->pluck('name');
7 
8$plucked->all();
9 
10// ['Desk', 'Chair']
1$collection = collect([
2 ['product_id' => 'prod-100', 'name' => 'Desk'],
3 ['product_id' => 'prod-200', 'name' => 'Chair'],
4]);
5 
6$plucked = $collection->pluck('name');
7 
8$plucked->all();
9 
10// ['Desk', 'Chair']

You may also specify how you wish the resulting collection to be keyed:

1$plucked = $collection->pluck('name', 'product_id');
2 
3$plucked->all();
4 
5// ['prod-100' => 'Desk', 'prod-200' => 'Chair']
1$plucked = $collection->pluck('name', 'product_id');
2 
3$plucked->all();
4 
5// ['prod-100' => 'Desk', 'prod-200' => 'Chair']

The pluck method also supports retrieving nested values using "dot" notation:

1$collection = collect([
2 [
3 'name' => 'Laracon',
4 'speakers' => [
5 'first_day' => ['Rosa', 'Judith'],
6 ],
7 ],
8 [
9 'name' => 'VueConf',
10 'speakers' => [
11 'first_day' => ['Abigail', 'Joey'],
12 ],
13 ],
14]);
15 
16$plucked = $collection->pluck('speakers.first_day');
17 
18$plucked->all();
19 
20// [['Rosa', 'Judith'], ['Abigail', 'Joey']]
1$collection = collect([
2 [
3 'name' => 'Laracon',
4 'speakers' => [
5 'first_day' => ['Rosa', 'Judith'],
6 ],
7 ],
8 [
9 'name' => 'VueConf',
10 'speakers' => [
11 'first_day' => ['Abigail', 'Joey'],
12 ],
13 ],
14]);
15 
16$plucked = $collection->pluck('speakers.first_day');
17 
18$plucked->all();
19 
20// [['Rosa', 'Judith'], ['Abigail', 'Joey']]

If duplicate keys exist, the last matching element will be inserted into the plucked collection:

1$collection = collect([
2 ['brand' => 'Tesla', 'color' => 'red'],
3 ['brand' => 'Pagani', 'color' => 'white'],
4 ['brand' => 'Tesla', 'color' => 'black'],
5 ['brand' => 'Pagani', 'color' => 'orange'],
6]);
7 
8$plucked = $collection->pluck('color', 'brand');
9 
10$plucked->all();
11 
12// ['Tesla' => 'black', 'Pagani' => 'orange']
1$collection = collect([
2 ['brand' => 'Tesla', 'color' => 'red'],
3 ['brand' => 'Pagani', 'color' => 'white'],
4 ['brand' => 'Tesla', 'color' => 'black'],
5 ['brand' => 'Pagani', 'color' => 'orange'],
6]);
7 
8$plucked = $collection->pluck('color', 'brand');
9 
10$plucked->all();
11 
12// ['Tesla' => 'black', 'Pagani' => 'orange']

pop()

The pop method removes and returns the last item from the collection:

1$collection = collect([1, 2, 3, 4, 5]);
2 
3$collection->pop();
4 
5// 5
6 
7$collection->all();
8 
9// [1, 2, 3, 4]
1$collection = collect([1, 2, 3, 4, 5]);
2 
3$collection->pop();
4 
5// 5
6 
7$collection->all();
8 
9// [1, 2, 3, 4]

You may pass an integer to the pop method to remove and return multiple items from the end of a collection:

1$collection = collect([1, 2, 3, 4, 5]);
2 
3$collection->pop(3);
4 
5// collect([5, 4, 3])
6 
7$collection->all();
8 
9// [1, 2]
1$collection = collect([1, 2, 3, 4, 5]);
2 
3$collection->pop(3);
4 
5// collect([5, 4, 3])
6 
7$collection->all();
8 
9// [1, 2]

prepend()

The prepend method adds an item to the beginning of the collection:

1$collection = collect([1, 2, 3, 4, 5]);
2 
3$collection->prepend(0);
4 
5$collection->all();
6 
7// [0, 1, 2, 3, 4, 5]
1$collection = collect([1, 2, 3, 4, 5]);
2 
3$collection->prepend(0);
4 
5$collection->all();
6 
7// [0, 1, 2, 3, 4, 5]

You may also pass a second argument to specify the key of the prepended item:

1$collection = collect(['one' => 1, 'two' => 2]);
2 
3$collection->prepend(0, 'zero');
4 
5$collection->all();
6 
7// ['zero' => 0, 'one' => 1, 'two' => 2]
1$collection = collect(['one' => 1, 'two' => 2]);
2 
3$collection->prepend(0, 'zero');
4 
5$collection->all();
6 
7// ['zero' => 0, 'one' => 1, 'two' => 2]

pull()

The pull method removes and returns an item from the collection by its key:

1$collection = collect(['product_id' => 'prod-100', 'name' => 'Desk']);
2 
3$collection->pull('name');
4 
5// 'Desk'
6 
7$collection->all();
8 
9// ['product_id' => 'prod-100']
1$collection = collect(['product_id' => 'prod-100', 'name' => 'Desk']);
2 
3$collection->pull('name');
4 
5// 'Desk'
6 
7$collection->all();
8 
9// ['product_id' => 'prod-100']

push()

The push method appends an item to the end of the collection:

1$collection = collect([1, 2, 3, 4]);
2 
3$collection->push(5);
4 
5$collection->all();
6 
7// [1, 2, 3, 4, 5]
1$collection = collect([1, 2, 3, 4]);
2 
3$collection->push(5);
4 
5$collection->all();
6 
7// [1, 2, 3, 4, 5]

put()

The put method sets the given key and value in the collection:

1$collection = collect(['product_id' => 1, 'name' => 'Desk']);
2 
3$collection->put('price', 100);
4 
5$collection->all();
6 
7// ['product_id' => 1, 'name' => 'Desk', 'price' => 100]
1$collection = collect(['product_id' => 1, 'name' => 'Desk']);
2 
3$collection->put('price', 100);
4 
5$collection->all();
6 
7// ['product_id' => 1, 'name' => 'Desk', 'price' => 100]

random()

The random method returns a random item from the collection:

1$collection = collect([1, 2, 3, 4, 5]);
2 
3$collection->random();
4 
5// 4 - (retrieved randomly)
1$collection = collect([1, 2, 3, 4, 5]);
2 
3$collection->random();
4 
5// 4 - (retrieved randomly)

You may pass an integer to random to specify how many items you would like to randomly retrieve. A collection of items is always returned when explicitly passing the number of items you wish to receive:

1$random = $collection->random(3);
2 
3$random->all();
4 
5// [2, 4, 5] - (retrieved randomly)
1$random = $collection->random(3);
2 
3$random->all();
4 
5// [2, 4, 5] - (retrieved randomly)

If the collection instance has fewer items than requested, the random method will throw an InvalidArgumentException.

The random method also accepts a closure, which will receive the current collection instance:

1$random = $collection->random(fn ($items) => min(10, count($items)));
2 
3$random->all();
4 
5// [1, 2, 3, 4, 5] - (retrieved randomly)
1$random = $collection->random(fn ($items) => min(10, count($items)));
2 
3$random->all();
4 
5// [1, 2, 3, 4, 5] - (retrieved randomly)

range()

The range method returns a collection containing integers between the specified range:

1$collection = collect()->range(3, 6);
2 
3$collection->all();
4 
5// [3, 4, 5, 6]
1$collection = collect()->range(3, 6);
2 
3$collection->all();
4 
5// [3, 4, 5, 6]

reduce()

The reduce method reduces the collection to a single value, passing the result of each iteration into the subsequent iteration:

1$collection = collect([1, 2, 3]);
2 
3$total = $collection->reduce(function ($carry, $item) {
4 return $carry + $item;
5});
6 
7// 6
1$collection = collect([1, 2, 3]);
2 
3$total = $collection->reduce(function ($carry, $item) {
4 return $carry + $item;
5});
6 
7// 6

The value for $carry on the first iteration is null; however, you may specify its initial value by passing a second argument to reduce:

1$collection->reduce(function ($carry, $item) {
2 return $carry + $item;
3}, 4);
4 
5// 10
1$collection->reduce(function ($carry, $item) {
2 return $carry + $item;
3}, 4);
4 
5// 10

The reduce method also passes array keys in associative collections to the given callback:

1$collection = collect([
2 'usd' => 1400,
3 'gbp' => 1200,
4 'eur' => 1000,
5]);
6 
7$ratio = [
8 'usd' => 1,
9 'gbp' => 1.37,
10 'eur' => 1.22,
11];
12 
13$collection->reduce(function ($carry, $value, $key) use ($ratio) {
14 return $carry + ($value * $ratio[$key]);
15});
16 
17// 4264
1$collection = collect([
2 'usd' => 1400,
3 'gbp' => 1200,
4 'eur' => 1000,
5]);
6 
7$ratio = [
8 'usd' => 1,
9 'gbp' => 1.37,
10 'eur' => 1.22,
11];
12 
13$collection->reduce(function ($carry, $value, $key) use ($ratio) {
14 return $carry + ($value * $ratio[$key]);
15});
16 
17// 4264

reduceSpread()

The reduceSpread method reduces the collection to an array of values, passing the results of each iteration into the subsequent iteration. This method is similar to the reduce method; however, it can accept multiple initial values:

1[$creditsRemaining, $batch] = Image::where('status', 'unprocessed')
2 ->get()
3 ->reduceSpread(function ($creditsRemaining, $batch, $image) {
4 if ($creditsRemaining >= $image->creditsRequired()) {
5 $batch->push($image);
6 
7 $creditsRemaining -= $image->creditsRequired();
8 }
9 
10 return [$creditsRemaining, $batch];
11 }, $creditsAvailable, collect());
1[$creditsRemaining, $batch] = Image::where('status', 'unprocessed')
2 ->get()
3 ->reduceSpread(function ($creditsRemaining, $batch, $image) {
4 if ($creditsRemaining >= $image->creditsRequired()) {
5 $batch->push($image);
6 
7 $creditsRemaining -= $image->creditsRequired();
8 }
9 
10 return [$creditsRemaining, $batch];
11 }, $creditsAvailable, collect());

reject()

The reject method filters the collection using the given closure. The closure should return true if the item should be removed from the resulting collection:

1$collection = collect([1, 2, 3, 4]);
2 
3$filtered = $collection->reject(function ($value, $key) {
4 return $value > 2;
5});
6 
7$filtered->all();
8 
9// [1, 2]
1$collection = collect([1, 2, 3, 4]);
2 
3$filtered = $collection->reject(function ($value, $key) {
4 return $value > 2;
5});
6 
7$filtered->all();
8 
9// [1, 2]

For the inverse of the reject method, see the filter method.

replace()

The replace method behaves similarly to merge; however, in addition to overwriting matching items that have string keys, the replace method will also overwrite items in the collection that have matching numeric keys:

1$collection = collect(['Taylor', 'Abigail', 'James']);
2 
3$replaced = $collection->replace([1 => 'Victoria', 3 => 'Finn']);
4 
5$replaced->all();
6 
7// ['Taylor', 'Victoria', 'James', 'Finn']
1$collection = collect(['Taylor', 'Abigail', 'James']);
2 
3$replaced = $collection->replace([1 => 'Victoria', 3 => 'Finn']);
4 
5$replaced->all();
6 
7// ['Taylor', 'Victoria', 'James', 'Finn']

replaceRecursive()

This method works like replace, but it will recur into arrays and apply the same replacement process to the inner values:

1$collection = collect([
2 'Taylor',
3 'Abigail',
4 [
5 'James',
6 'Victoria',
7 'Finn'
8 ]
9]);
10 
11$replaced = $collection->replaceRecursive([
12 'Charlie',
13 2 => [1 => 'King']
14]);
15 
16$replaced->all();
17 
18// ['Charlie', 'Abigail', ['James', 'King', 'Finn']]
1$collection = collect([
2 'Taylor',
3 'Abigail',
4 [
5 'James',
6 'Victoria',
7 'Finn'
8 ]
9]);
10 
11$replaced = $collection->replaceRecursive([
12 'Charlie',
13 2 => [1 => 'King']
14]);
15 
16$replaced->all();
17 
18// ['Charlie', 'Abigail', ['James', 'King', 'Finn']]

reverse()

The reverse method reverses the order of the collection's items, preserving the original keys:

1$collection = collect(['a', 'b', 'c', 'd', 'e']);
2 
3$reversed = $collection->reverse();
4 
5$reversed->all();
6 
7/*
8 [
9 4 => 'e',
10 3 => 'd',
11 2 => 'c',
12 1 => 'b',
13 0 => 'a',
14 ]
15*/
1$collection = collect(['a', 'b', 'c', 'd', 'e']);
2 
3$reversed = $collection->reverse();
4 
5$reversed->all();
6 
7/*
8 [
9 4 => 'e',
10 3 => 'd',
11 2 => 'c',
12 1 => 'b',
13 0 => 'a',
14 ]
15*/

The search method searches the collection for the given value and returns its key if found. If the item is not found, false is returned:

1$collection = collect([2, 4, 6, 8]);
2 
3$collection->search(4);
4 
5// 1
1$collection = collect([2, 4, 6, 8]);
2 
3$collection->search(4);
4 
5// 1

The search is done using a "loose" comparison, meaning a string with an integer value will be considered equal to an integer of the same value. To use "strict" comparison, pass true as the second argument to the method:

1collect([2, 4, 6, 8])->search('4', $strict = true);
2 
3// false
1collect([2, 4, 6, 8])->search('4', $strict = true);
2 
3// false

Alternatively, you may provide your own closure to search for the first item that passes a given truth test:

1collect([2, 4, 6, 8])->search(function ($item, $key) {
2 return $item > 5;
3});
4 
5// 2
1collect([2, 4, 6, 8])->search(function ($item, $key) {
2 return $item > 5;
3});
4 
5// 2

shift()

The shift method removes and returns the first item from the collection:

1$collection = collect([1, 2, 3, 4, 5]);
2 
3$collection->shift();
4 
5// 1
6 
7$collection->all();
8 
9// [2, 3, 4, 5]
1$collection = collect([1, 2, 3, 4, 5]);
2 
3$collection->shift();
4 
5// 1
6 
7$collection->all();
8 
9// [2, 3, 4, 5]

You may pass an integer to the shift method to remove and return multiple items from the beginning of a collection:

1$collection = collect([1, 2, 3, 4, 5]);
2 
3$collection->shift(3);
4 
5// collect([1, 2, 3])
6 
7$collection->all();
8 
9// [4, 5]
1$collection = collect([1, 2, 3, 4, 5]);
2 
3$collection->shift(3);
4 
5// collect([1, 2, 3])
6 
7$collection->all();
8 
9// [4, 5]

shuffle()

The shuffle method randomly shuffles the items in the collection:

1$collection = collect([1, 2, 3, 4, 5]);
2 
3$shuffled = $collection->shuffle();
4 
5$shuffled->all();
6 
7// [3, 2, 5, 1, 4] - (generated randomly)
1$collection = collect([1, 2, 3, 4, 5]);
2 
3$shuffled = $collection->shuffle();
4 
5$shuffled->all();
6 
7// [3, 2, 5, 1, 4] - (generated randomly)

skip()

The skip method returns a new collection, with the given number of elements removed from the beginning of the collection:

1$collection = collect([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
2 
3$collection = $collection->skip(4);
4 
5$collection->all();
6 
7// [5, 6, 7, 8, 9, 10]
1$collection = collect([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
2 
3$collection = $collection->skip(4);
4 
5$collection->all();
6 
7// [5, 6, 7, 8, 9, 10]

skipUntil()

The skipUntil method skips over items from the collection until the given callback returns true and then returns the remaining items in the collection as a new collection instance:

1$collection = collect([1, 2, 3, 4]);
2 
3$subset = $collection->skipUntil(function ($item) {
4 return $item >= 3;
5});
6 
7$subset->all();
8 
9// [3, 4]
1$collection = collect([1, 2, 3, 4]);
2 
3$subset = $collection->skipUntil(function ($item) {
4 return $item >= 3;
5});
6 
7$subset->all();
8 
9// [3, 4]

You may also pass a simple value to the skipUntil method to skip all items until the given value is found:

1$collection = collect([1, 2, 3, 4]);
2 
3$subset = $collection->skipUntil(3);
4 
5$subset->all();
6 
7// [3, 4]
1$collection = collect([1, 2, 3, 4]);
2 
3$subset = $collection->skipUntil(3);
4 
5$subset->all();
6 
7// [3, 4]
exclamation

If the given value is not found or the callback never returns true, the skipUntil method will return an empty collection.

skipWhile()

The skipWhile method skips over items from the collection while the given callback returns true and then returns the remaining items in the collection as a new collection:

1$collection = collect([1, 2, 3, 4]);
2 
3$subset = $collection->skipWhile(function ($item) {
4 return $item <= 3;
5});
6 
7$subset->all();
8 
9// [4]
1$collection = collect([1, 2, 3, 4]);
2 
3$subset = $collection->skipWhile(function ($item) {
4 return $item <= 3;
5});
6 
7$subset->all();
8 
9// [4]
exclamation

If the callback never returns false, the skipWhile method will return an empty collection.

slice()

The slice method returns a slice of the collection starting at the given index:

1$collection = collect([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
2 
3$slice = $collection->slice(4);
4 
5$slice->all();
6 
7// [5, 6, 7, 8, 9, 10]
1$collection = collect([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
2 
3$slice = $collection->slice(4);
4 
5$slice->all();
6 
7// [5, 6, 7, 8, 9, 10]

If you would like to limit the size of the returned slice, pass the desired size as the second argument to the method:

1$slice = $collection->slice(4, 2);
2 
3$slice->all();
4 
5// [5, 6]
1$slice = $collection->slice(4, 2);
2 
3$slice->all();
4 
5// [5, 6]

The returned slice will preserve keys by default. If you do not wish to preserve the original keys, you can use the values method to reindex them.

sliding()

The sliding method returns a new collection of chunks representing a "sliding window" view of the items in the collection:

1$collection = collect([1, 2, 3, 4, 5]);
2 
3$chunks = $collection->sliding(2);
4 
5$chunks->toArray();
6 
7// [[1, 2], [2, 3], [3, 4], [4, 5]]
1$collection = collect([1, 2, 3, 4, 5]);
2 
3$chunks = $collection->sliding(2);
4 
5$chunks->toArray();
6 
7// [[1, 2], [2, 3], [3, 4], [4, 5]]

This is especially useful in conjunction with the eachSpread method:

1$transactions->sliding(2)->eachSpread(function ($previous, $current) {
2 $current->total = $previous->total + $current->amount;
3});
1$transactions->sliding(2)->eachSpread(function ($previous, $current) {
2 $current->total = $previous->total + $current->amount;
3});

You may optionally pass a second "step" value, which determines the distance between the first item of every chunk:

1$collection = collect([1, 2, 3, 4, 5]);
2 
3$chunks = $collection->sliding(3, step: 2);
4 
5$chunks->toArray();
6 
7// [[1, 2, 3], [3, 4, 5]]
1$collection = collect([1, 2, 3, 4, 5]);
2 
3$chunks = $collection->sliding(3, step: 2);
4 
5$chunks->toArray();
6 
7// [[1, 2, 3], [3, 4, 5]]

sole()

The sole method returns the first element in the collection that passes a given truth test, but only if the truth test matches exactly one element:

1collect([1, 2, 3, 4])->sole(function ($value, $key) {
2 return $value === 2;
3});
4 
5// 2
1collect([1, 2, 3, 4])->sole(function ($value, $key) {
2 return $value === 2;
3});
4 
5// 2

You may also pass a key / value pair to the sole method, which will return the first element in the collection that matches the given pair, but only if it exactly one element matches:

1$collection = collect([
2 ['product' => 'Desk', 'price' => 200],
3 ['product' => 'Chair', 'price' => 100],
4]);
5 
6$collection->sole('product', 'Chair');
7 
8// ['product' => 'Chair', 'price' => 100]
1$collection = collect([
2 ['product' => 'Desk', 'price' => 200],
3 ['product' => 'Chair', 'price' => 100],
4]);
5 
6$collection->sole('product', 'Chair');
7 
8// ['product' => 'Chair', 'price' => 100]

Alternatively, you may also call the sole method with no argument to get the first element in the collection if there is only one element:

1$collection = collect([
2 ['product' => 'Desk', 'price' => 200],
3]);
4 
5$collection->sole();
6 
7// ['product' => 'Desk', 'price' => 200]
1$collection = collect([
2 ['product' => 'Desk', 'price' => 200],
3]);
4 
5$collection->sole();
6 
7// ['product' => 'Desk', 'price' => 200]

If there are no elements in the collection that should be returned by the sole method, an \Illuminate\Collections\ItemNotFoundException exception will be thrown. If there is more than one element that should be returned, an \Illuminate\Collections\MultipleItemsFoundException will be thrown.

some()

Alias for the contains method.

sort()

The sort method sorts the collection. The sorted collection keeps the original array keys, so in the following example we will use the values method to reset the keys to consecutively numbered indexes:

1$collection = collect([5, 3, 1, 2, 4]);
2 
3$sorted = $collection->sort();
4 
5$sorted->values()->all();
6 
7// [1, 2, 3, 4, 5]
1$collection = collect([5, 3, 1, 2, 4]);
2 
3$sorted = $collection->sort();
4 
5$sorted->values()->all();
6 
7// [1, 2, 3, 4, 5]

If your sorting needs are more advanced, you may pass a callback to sort with your own algorithm. Refer to the PHP documentation on uasort, which is what the collection's sort method calls utilizes internally.

lightbulb

If you need to sort a collection of nested arrays or objects, see the sortBy and sortByDesc methods.

sortBy()

The sortBy method sorts the collection by the given key. The sorted collection keeps the original array keys, so in the following example we will use the values method to reset the keys to consecutively numbered indexes:

1$collection = collect([
2 ['name' => 'Desk', 'price' => 200],
3 ['name' => 'Chair', 'price' => 100],
4 ['name' => 'Bookcase', 'price' => 150],
5]);
6 
7$sorted = $collection->sortBy('price');
8 
9$sorted->values()->all();
10 
11/*
12 [
13 ['name' => 'Chair', 'price' => 100],
14 ['name' => 'Bookcase', 'price' => 150],
15 ['name' => 'Desk', 'price' => 200],
16 ]
17*/
1$collection = collect([
2 ['name' => 'Desk', 'price' => 200],
3 ['name' => 'Chair', 'price' => 100],
4 ['name' => 'Bookcase', 'price' => 150],
5]);
6 
7$sorted = $collection->sortBy('price');
8 
9$sorted->values()->all();
10 
11/*
12 [
13 ['name' => 'Chair', 'price' => 100],
14 ['name' => 'Bookcase', 'price' => 150],
15 ['name' => 'Desk', 'price' => 200],
16 ]
17*/

The sortBy method accepts sort flags as its second argument:

1$collection = collect([
2 ['title' => 'Item 1'],
3 ['title' => 'Item 12'],
4 ['title' => 'Item 3'],
5]);
6 
7$sorted = $collection->sortBy('title', SORT_NATURAL);
8 
9$sorted->values()->all();
10 
11/*
12 [
13 ['title' => 'Item 1'],
14 ['title' => 'Item 3'],
15 ['title' => 'Item 12'],
16 ]
17*/
1$collection = collect([
2 ['title' => 'Item 1'],
3 ['title' => 'Item 12'],
4 ['title' => 'Item 3'],
5]);
6 
7$sorted = $collection->sortBy('title', SORT_NATURAL);
8 
9$sorted->values()->all();
10 
11/*
12 [
13 ['title' => 'Item 1'],
14 ['title' => 'Item 3'],
15 ['title' => 'Item 12'],
16 ]
17*/

Alternatively, you may pass your own closure to determine how to sort the collection's values:

1$collection = collect([
2 ['name' => 'Desk', 'colors' => ['Black', 'Mahogany']],
3 ['name' => 'Chair', 'colors' => ['Black']],
4 ['name' => 'Bookcase', 'colors' => ['Red', 'Beige', 'Brown']],
5]);
6 
7$sorted = $collection->sortBy(function ($product, $key) {
8 return count($product['colors']);
9});
10 
11$sorted->values()->all();
12 
13/*
14 [
15 ['name' => 'Chair', 'colors' => ['Black']],
16 ['name' => 'Desk', 'colors' => ['Black', 'Mahogany']],
17 ['name' => 'Bookcase', 'colors' => ['Red', 'Beige', 'Brown']],
18 ]
19*/
1$collection = collect([
2 ['name' => 'Desk', 'colors' => ['Black', 'Mahogany']],
3 ['name' => 'Chair', 'colors' => ['Black']],
4 ['name' => 'Bookcase', 'colors' => ['Red', 'Beige', 'Brown']],
5]);
6 
7$sorted = $collection->sortBy(function ($product, $key) {
8 return count($product['colors']);
9});
10 
11$sorted->values()->all();
12 
13/*
14 [
15 ['name' => 'Chair', 'colors' => ['Black']],
16 ['name' => 'Desk', 'colors' => ['Black', 'Mahogany']],
17 ['name' => 'Bookcase', 'colors' => ['Red', 'Beige', 'Brown']],
18 ]
19*/

If you would like to sort your collection by multiple attributes, you may pass an array of sort operations to the sortBy method. Each sort operation should be an array consisting of the attribute that you wish to sort by and the direction of the desired sort:

1$collection = collect([
2 ['name' => 'Taylor Otwell', 'age' => 34],
3 ['name' => 'Abigail Otwell', 'age' => 30],
4 ['name' => 'Taylor Otwell', 'age' => 36],
5 ['name' => 'Abigail Otwell', 'age' => 32],
6]);
7 
8$sorted = $collection->sortBy([
9 ['name', 'asc'],
10 ['age', 'desc'],
11]);
12 
13$sorted->values()->all();
14 
15/*
16 [
17 ['name' => 'Abigail Otwell', 'age' => 32],
18 ['name' => 'Abigail Otwell', 'age' => 30],
19 ['name' => 'Taylor Otwell', 'age' => 36],
20 ['name' => 'Taylor Otwell', 'age' => 34],
21 ]
22*/
1$collection = collect([
2 ['name' => 'Taylor Otwell', 'age' => 34],
3 ['name' => 'Abigail Otwell', 'age' => 30],
4 ['name' => 'Taylor Otwell', 'age' => 36],
5 ['name' => 'Abigail Otwell', 'age' => 32],
6]);
7 
8$sorted = $collection->sortBy([
9 ['name', 'asc'],
10 ['age', 'desc'],
11]);
12 
13$sorted->values()->all();
14 
15/*
16 [
17 ['name' => 'Abigail Otwell', 'age' => 32],
18 ['name' => 'Abigail Otwell', 'age' => 30],
19 ['name' => 'Taylor Otwell', 'age' => 36],
20 ['name' => 'Taylor Otwell', 'age' => 34],
21 ]
22*/

When sorting a collection by multiple attributes, you may also provide closures that define each sort operation:

1$collection = collect([
2 ['name' => 'Taylor Otwell', 'age' => 34],
3 ['name' => 'Abigail Otwell', 'age' => 30],
4 ['name' => 'Taylor Otwell', 'age' => 36],
5 ['name' => 'Abigail Otwell', 'age' => 32],
6]);
7 
8$sorted = $collection->sortBy([
9 fn ($a, $b) => $a['name'] <=> $b['name'],
10 fn ($a, $b) => $b['age'] <=> $a['age'],
11]);
12 
13$sorted->values()->all();
14 
15/*
16 [
17 ['name' => 'Abigail Otwell', 'age' => 32],
18 ['name' => 'Abigail Otwell', 'age' => 30],
19 ['name' => 'Taylor Otwell', 'age' => 36],
20 ['name' => 'Taylor Otwell', 'age' => 34],
21 ]
22*/
1$collection = collect([
2 ['name' => 'Taylor Otwell', 'age' => 34],
3 ['name' => 'Abigail Otwell', 'age' => 30],
4 ['name' => 'Taylor Otwell', 'age' => 36],
5 ['name' => 'Abigail Otwell', 'age' => 32],
6]);
7 
8$sorted = $collection->sortBy([
9 fn ($a, $b) => $a['name'] <=> $b['name'],
10 fn ($a, $b) => $b['age'] <=> $a['age'],
11]);
12 
13$sorted->values()->all();
14 
15/*
16 [
17 ['name' => 'Abigail Otwell', 'age' => 32],
18 ['name' => 'Abigail Otwell', 'age' => 30],
19 ['name' => 'Taylor Otwell', 'age' => 36],
20 ['name' => 'Taylor Otwell', 'age' => 34],
21 ]
22*/

sortByDesc()

This method has the same signature as the sortBy method, but will sort the collection in the opposite order.

sortDesc()

This method will sort the collection in the opposite order as the sort method:

1$collection = collect([5, 3, 1, 2, 4]);
2 
3$sorted = $collection->sortDesc();
4 
5$sorted->values()->all();
6 
7// [5, 4, 3, 2, 1]
1$collection = collect([5, 3, 1, 2, 4]);
2 
3$sorted = $collection->sortDesc();
4 
5$sorted->values()->all();
6 
7// [5, 4, 3, 2, 1]

Unlike sort, you may not pass a closure to sortDesc. Instead, you should use the sort method and invert your comparison.

sortKeys()

The sortKeys method sorts the collection by the keys of the underlying associative array:

1$collection = collect([
2 'id' => 22345,
3 'first' => 'John',
4 'last' => 'Doe',
5]);
6 
7$sorted = $collection->sortKeys();
8 
9$sorted->all();
10 
11/*
12 [
13 'first' => 'John',
14 'id' => 22345,
15 'last' => 'Doe',
16 ]
17*/
1$collection = collect([
2 'id' => 22345,
3 'first' => 'John',
4 'last' => 'Doe',
5]);
6 
7$sorted = $collection->sortKeys();
8 
9$sorted->all();
10 
11/*
12 [
13 'first' => 'John',
14 'id' => 22345,
15 'last' => 'Doe',
16 ]
17*/

sortKeysDesc()

This method has the same signature as the sortKeys method, but will sort the collection in the opposite order.

sortKeysUsing()

The sortKeysUsing method sorts the collection by the keys of the underlying associative array using a callback:

1$collection = collect([
2 'ID' => 22345,
3 'first' => 'John',
4 'last' => 'Doe',
5]);
6 
7$sorted = $collection->sortKeysUsing('strnatcasecmp');
8 
9$sorted->all();
10 
11/*
12 [
13 'first' => 'John',
14 'ID' => 22345,
15 'last' => 'Doe',
16 ]
17*/
1$collection = collect([
2 'ID' => 22345,
3 'first' => 'John',
4 'last' => 'Doe',
5]);
6 
7$sorted = $collection->sortKeysUsing('strnatcasecmp');
8 
9$sorted->all();
10 
11/*
12 [
13 'first' => 'John',
14 'ID' => 22345,
15 'last' => 'Doe',
16 ]
17*/

The callback must be a comparison function that returns an integer less than, equal to, or greater than zero. For more information, refer to the PHP documentation on uksort, which is the PHP function that sortKeysUsing method utilizes internally.

splice()

The splice method removes and returns a slice of items starting at the specified index:

1$collection = collect([1, 2, 3, 4, 5]);
2 
3$chunk = $collection->splice(2);
4 
5$chunk->all();
6 
7// [3, 4, 5]
8 
9$collection->all();
10 
11// [1, 2]
1$collection = collect([1, 2, 3, 4, 5]);
2 
3$chunk = $collection->splice(2);
4 
5$chunk->all();
6 
7// [3, 4, 5]
8 
9$collection->all();
10 
11// [1, 2]

You may pass a second argument to limit the size of the resulting collection:

1$collection = collect([1, 2, 3, 4, 5]);
2 
3$chunk = $collection->splice(2, 1);
4 
5$chunk->all();
6 
7// [3]
8 
9$collection->all();
10 
11// [1, 2, 4, 5]
1$collection = collect([1, 2, 3, 4, 5]);
2 
3$chunk = $collection->splice(2, 1);
4 
5$chunk->all();
6 
7// [3]
8 
9$collection->all();