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# array_chunk

(PHP 4 >= 4.2.0, PHP 5)

array_chunk -- Split an array into chunks

## Description

array array_chunk ( array input, int size [, bool preserve_keys] )

array_chunk() splits the array into several arrays with size values in them. You may also have an array with less values at the end. You get the arrays as members of a multidimensional array indexed with numbers starting from zero.

By setting the optional preserve_keys parameter to `TRUE`, you can force PHP to preserve the original keys from the input array. If you specify `FALSE` new number indices will be used in each resulting array with indices starting from zero. The default is `FALSE`.

範例 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
            )

    )

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