- var_dump: documentation ( source)
<?php
$array = [1,2];
foreach($array as &$a) {
if ($a == 1) {
$array[] = 3;
}
echo $a . "\n";
}
var_dump($array);
echo "----------\n";
foreach($array as $a) {
var_dump($a);
echo $a . "\n";
}