--TEST--
array_walk() function precerve foreach by reference iterator pointer
--FILE--
<?php
$a = [1,2,3,4,5];
foreach($a as &$v) {
    echo "$v\n";
    if ($v == 3) {
        array_walk($a, function (&$x) {$x+=10;});
    }
}
?>
--EXPECT--
1
2
3
14
15