- preg_replace: documentation ( source)
<?php
$query = "UPDATE `benefits` SET `ins_id`=:ins_id, `order`=:order WHERE `ben_id`=:ben_id";
$querydata = array(':ins_id' => 1001, ':order' => 1, ':ben_id' => 4004);
echo "$query\n\n";
foreach($querydata AS $key=>$val)
{
echo preg_replace('/(.+?)('.$key.')(.*)/','$1' . $val . '$3', $query) . "\n";
//echo $query;
}