復(fù)制代碼 代碼如下:

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

復(fù)制代碼 代碼如下:

<?php
foreach (array(1, 2, 3, 4) as &$value) {
$value = $value * 2;
}
?>