php中array_chunk保留键名怎么做_php分块后键名延续与自定义索引重置技巧

$original = ['a' => 1, 'b' => 2, 'c' => 3, 'd' => 4];
$chunks = array_chunk($original, 2);
print_r($chunks);

Array
(
    [0] => Array
        (
            [0] => 1
            [1] => 2
        )
    [1] => Array
        (
            [0] => 3
            [1] => 4
        )
)

function array_chunk_with_keys($array, $size) {
    $chunks = [];
    $keys = array_keys($array);
    for ($i = 0; $i < count($keys); $i += $size) {
        $chunk = [];
        $slicedKeys = array_slice($keys, $i, $size);
        foreach ($slicedKeys as $key) {
            $chunk[$key] = $array[$key];
        }
        $chunks[] = $chunk;
    }
    return $chunks;
}

$original = ['a' => 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5];
$chunks = array_chunk_with_keys($original, 2);
print_r($chunks);

Array
(
    [0] => Array
        (
            [a] => 1
            [b] => 2
        )
    [1] => Array
        (
            [c] => 3
            [d] => 4
        )
    [2] => Array
        (
            [e] => 5
        )
)

function array_chunk_advanced($array, $size, $preserveKeys = true, $resetIndex = false) {
    $chunks = [];
    $keys = array_keys($array);
    for ($i = 0; $i < count($keys); $i += $size) {
        $slicedKeys = array_slice($keys, $i, $size);
        $chunk = [];
        foreach ($slicedKeys as $key) {
            $chunk[$key] = $array[$key];
        }
        if (!$preserveKeys) {
            $chunk = array_values($chunk);
        }
        if ($resetIndex) {
            $chunk = array_values($chunk);
        }
        $chunks[] = $chunk;
    }
    return $chunks;
}

$chunks = array_chunk_advanced($original, 2, false);
// 输出：[[1,2], [3,4], [5]]