function merge_array($arr1, $arr2)
{
foreach ($arr1 as $k => $v) {
if (isset($arr2[$k])) {
if (is_array($arr1[$k]) && is_array($arr2[$k])) {
$arr2[$k] = T3Common::merge_array($arr1[$k], $arr2[$k]);
}
} else {
$arr2[$k] = $arr1[$k];
}
}
return $arr2;
}