note 47735 deleted from function.preg-replace by tularis

Note Submitter: Yunbin Bai ---- If you want to use /e in the Reg expression, I think using escaped double quote is better than just single quote in the replacement parameter. I meet this problem when I try to replace a string that contains double quote in it, it cost me some time to solve this. So I simplified my code and present here: consider capitalize SSI directives in the input text: $html_body = "<!--#include virtual=\"header.htm\" -->"; //That is, source text: <!--#include virtual="header.htm" --> $html_body = preg_replace('/(<!--#)(.*)(-->)/e', "'\\1'.strtoupper('\\2').'\\3'", $html_body); echo $html_body; //output text: <!--#INCLUDE VIRTUAL=\"HEADER.HTM\" --> //Result is not what you want: there is additional backslash generated that is useless. My Solution to this: use \" instead of ', that make it a little mess, but garanteed working. $html_body = preg_replace('/(<!--#)(.*)(-->)/e', "\"\\1\".strtoupper(\"\\2\").\"\\3\"", $html_body); echo $html_body; //result is correct now: <!--#INCLUDE VIRTUAL="HEADER.HTM" -->