083-PHP的foreach循环

<?php
    $arr = array(1, 2, 3, 4);
    foreach ($arr as &$value) {
        $value = $value * 2;
    }
    
    print_r($arr); // $arr is now array(2, 4, 6, 8)
?>

 

转载于:https://www.cnblogs.com/tianpan2019/p/10999878.html