分裂数组chuncks特定数量的 [英] Split array into a specific number of chuncks

问题描述

我知道array_chunck允许分割的阵列成几个chuncks，但根据元素的数量的的chuncks变化次数。我需要的是对阵列总是分裂成像4阵列例如阵列的特定号码。

I know that array_chunck allows to split an array into several chuncks, but the number of chuncks changes according to the number of elements. What I need is to always split the array into a specific number of arrays like 4 arrays for example.

以下code分割数组3 chuncks，二chuncks每2个元素和1 chunch 1元。我想是到阵列总是分成4 chuncks，不管总的元素数量的阵列，但总是试图在chuncks均匀划分的元素如array_chunck功能一样。我怎样才能做到这一点？是否有任何PHP函数呢？

The following code splits the array into 3 chuncks, two chuncks with 2 elements each and 1 chunch with 1 element. What I would like is to split the array always into 4 chuncks, no matter the number of total elements that the array has, but always trying to divide the elements evenly in the chuncks like the array_chunck function does. How can I accomplish this? Is there any php function for this?

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

感谢您。

推荐答案

您可以尝试

$input_array = array(
        'a',
        'b',
        'c',
        'd',
        'e'
);

print_r(partition($input_array, 4));

输出

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

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

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

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

)

功能用于

/**
 * 
 * @param Array $list
 * @param int $p
 * @return multitype:multitype:
 * @link http://www.php.net/manual/en/function.array-chunk.php#75022
 */
function partition(Array $list, $p) {
    $listlen = count($list);
    $partlen = floor($listlen / $p);
    $partrem = $listlen % $p;
    $partition = array();
    $mark = 0;
    for($px = 0; $px < $p; $px ++) {
        $incr = ($px < $partrem) ? $partlen + 1 : $partlen;
        $partition[$px] = array_slice($list, $mark, $incr);
        $mark += $incr;
    }
    return $partition;
}

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