rewrite urls with preg_replace

Hi to all the PHP-Fans out there, i have a syntax-problem with the folowing preg_replace command: $returnString = preg_replace("/(href=\")(.+?)(\")/is", preg_quote("\\1".ebLinkEncode(."\\2".)."\\3"), $returnString); i'm trying to call my own function within a preg_replace function and it won't work. any ideas ? it seems to me, that the quoting is incorrect, but i'm not shure, why it is incorrect, especially because i use preg_quote() ... thanks in advance for some hints ! best regards dieter.koch@lhsystems.com