<?
$k="%C5%DA%B7%B9%C5%E4%BA%F1%C5%DA%B7%B9%C5%E4%BA%F1";
$q="%C5%DA";
$b=strrchr($k,$q);
echo $k."<br>";
echo $q."<br>";
echo $b;
?>
///////result//////////
%C5%DA%B7%B9%C5%E4%BA%F1%C5%DA%B7%B9%C5%E4%BA%F1
%C5%DA
%F1

I want this result,"%C5%DA%B7%B9%C5%E4%BA%F1"
Maybe it is function's bug.