PHP algorithm to split array without array_chunk()_PHP tutorial

PHP algorithm to split array without array_chunk()

Use PHP to write an algorithm to split the array without using array_chunk(); the algorithm is as follows.

<?php
//$array 数组
//$size  每个数组的个数
//每个数组元素是否默认键值
function array_chunk_list($array, $size, $preserve_keys = false)
{
    reset($array);
    $i = 0;
    foreach ($array as $key => $value) {
        // 是否存在这个值
        if (! isset($newarray[$i])) {
            $newarray[$i] = array();
        }
        if (count($newarray[$i]) < $size) { // 先判断的问题
            if ($preserve_keys == false) {
                $newarray[$i][] = $value;
            } else {
                $newarray[$i][$key] = $value;
            }
        } else {
               $i++;
            if ($preserve_keys == false) {
                $newarray[$i][] = $value;
            } else {
                $newarray[$i][$key] = $value;
            }
        }
    }
    return $newarray;
}
  
  $array=array(1,2,3,4,5,6,7);
  print_r(array_chunk_list($array, 2,true));

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