Php/docs/function.array-chunk

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array_chunk

(PHP 4 >= 4.2.0, PHP 5, PHP 7)

array_chunkSplit an array into chunks


Description

array_chunk ( array $array , int $length [, bool $preserve_keys = FALSE ] ) : array

Chunks an array into arrays with length elements. The last chunk may contain less than length elements.


Parameters

array
The array to work on
length
The size of each chunk
preserve_keys
When set to TRUE keys will be preserved. Default is FALSE which will reindex the chunk numerically


Return Values

Returns a multidimensional numerically indexed array, starting with zero, with each dimension containing length elements.


Errors/Exceptions

If length is less than 1 E_WARNING will be thrown and NULL returned.


Examples

Example #1 array_chunk() example

<?php$input_array = array('a', 'b', 'c', 'd', 'e');print_r(array_chunk($input_array, 2));print_r(array_chunk($input_array, 2, true));?>

The above example will output:


Array
(
    [0] => Array
        (
            [0] => a
            [1] => b
        )

    [1] => Array
        (
            [0] => c
            [1] => d
        )

    [2] => Array
        (
            [0] => e
        )

)
Array
(
    [0] => Array
        (
            [0] => a
            [1] => b
        )

    [1] => Array
        (
            [2] => c
            [3] => d
        )

    [2] => Array
        (
            [4] => e
        )

)

See Also