Online PHP editor | refs for kemLH

<?php // Everything you enter here will be executed by our servers. Try it! $str = "1_1341383124_Photo /Jul \ fdsfs04, 423!g%$#dfas--543*@ 1 22 02 AM_20130724204332.png"; echo $a = strrpos($str,"."); $str2 = substr($str,0,$a); $str3 = preg_replace("/[-, :;.\/#!@$%^*-]/","_",$str2); $str3 = preg_replace("/[_]+/","_",$str3); echo $str3;