24. 移除元素

<?php
class Solution {
    public function removeElement(&$nums, $val) {
        $j = 0;
        for ($i = 0; $i < count($nums); $i++) {
            if ($nums[$i] != $val) {
                $j++;
            }
        }
        return $j;
    }
}
$nums = [3, 2, 2, 3, 4, 5];
$cls = new Solution();
$r = $cls->removeElement($nums, 4);
echo $r;