How to replace last occurrence of a string in php?

Following will just  replace the last occurrence of a substring inside of a string, you can copy this function into you code:

function lastReplace($search, $replace, $subject){
       $pos = strrpos($subject, $search);
       if($pos !== false){
           $subject = substr_replace($subject, $replace, $pos, strlen($search));
       }
       return $subject;
}