Usage of array_chunk in PHP

Transferred from: http://cn2.php.net/manual/zh/function.array-chunk.php

(PHP 4 >= 4.2.0, PHP 5)

array_chunk- splits an array into multiple

Descriptionarray array_chunk ( array $input , int $size [, bool $preserve_keys = false])

Splits an array into multiple arrays, each of which is determined by the number of cells in each array size . The number of cells in the last array may be less than size one.

Parameters

input

Array to operate on

size

Number of cells per array

preserve_keys

Set to TRUE allow PHP to keep the original key name in the input array. If you specify FALSE , then each result array will be indexed with a new zero-based number. The default value is FALSE .

return value

The resulting array is a cell in a multidimensional array whose index starts at zero and each dimension contains size elements.

Error/exception

If size it is less than 1, an error is thrown E_WARNING and returned NULL .

Example

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 routines 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        ))