PHP FOREACH문
$arr = array(1, 2, 3, 4);foreach ($arr as &$value) { $value = $value * 2;}// $arr is now array(2, 4, 6, 8)unset($value); // break the reference with the last element?> $arr1 = array("a" => 1, "b" => 2, "c" => 3);$arr2 = array("x" => 4, "y" => 5, "z" => 6);foreach ($arr1 as $key => &$val) {}foreach ($arr2 as $key => $val) {}var_dump($arr1);var_dump($arr2);?>The output is:array(3) { ["a"]=> int..