collapse() Method | Laravel Collection Example

Laravel collection provider array convenient wrapper for working with array collection, in this post we will learn how to use the collapse method in laravel collection.

The collapse() method we can use when multidimensional array need to make into a single array that time developer need to collapse method will help you to make multi-dimensional array convert into single array, simple we can say that multiple array convert into a single array and that will return collapse value tin single array.

collapse() | Laravel Collection Example

Here below working example that can help you with how to use the collapse method used in laravel collection.

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

// OUTPUT EXAMPLE 1

    Illuminate\Support\Collection {#6768 ▼
      #items: array:10 [▼
        0 => 1
        1 => 2
        2 => 3
        3 => 4
        4 => 5
        5 => 6
        6 => 7
        7 => 8
        8 => 9
        9 => 10
      ]
    }

// --------------------------------------------------------

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

// OUTPUT EXAMPLE 2

    // 1
    
// --------------------------------------------------------

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

// OUTPUT EXAMPLE 3

    array:10 [▼
      0 => 1
      1 => 2
      2 => 3
      3 => 4
      4 => 5
      5 => 6
      6 => 7
      7 => 8
      8 => 9
      9 => 10
    ]

// --------------------------------------------------------

// EXAMPLE 4
    
    $data = [
        [0 => ['array-1']],
        [1 => ['array-2']],
    ];
    
    $collection = collect($data)->collapse();

// OUTPUT EXAMPLE 4

    Illuminate\Support\Collection {#6768 ▼
      #items: array:2 [▼
        0 => array:1 [▼
          0 => "array-1"
        ]
        1 => array:1 [▼
          0 => "array-2"
        ]
      ]
    }
    
// --------------------------------------------------------

// EXAMPLE 5 
    
    $data = [
        [0 => ['array-1']],
        [1 => ['array-2']],
        [1,2,3,4,5]
    ];
    
    $collection = collect($data)->collapse();

// OUTPUT EXAMPLE 5

    Illuminate\Support\Collection {#6768 ▼
      #items: array:7 [▼
        0 => array:1 [▼
          0 => "array-1"
        ]
        1 => array:1 [▼
          0 => "array-2"
        ]
        2 => 1
        3 => 2
        4 => 3
        5 => 4
        6 => 5
      ]
    }

By referring above example you can easy to understand the collapse method in laravel collection.

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