#include <MsgBoxConstants.au3> ; to declare the Constants of MsgBox
Local $sRegex = "(?<!function )(?<!\/\/)print"
Local $sString = "<?php" & @CRLF & _
" // Description of file" & @CRLF & _
" ..." & @CRLF & _
" print("Foobar");" & @CRLF & _
" // print("Foo");" & @CRLF & _
" //print("bar");" & @CRLF & _
" // Open and print file" & @CRLF & _
" function printtemplate($file) {" & @CRLF & _
" ..." & @CRLF & _
" }" & @CRLF & _
" ..." & @CRLF & _
" printtemplate($file);" & @CRLF & _
" ... " & @CRLF & _
"?>"
Local $sSubst = "//$0"
Local $sResult = StringRegExpReplace($sString, $sRegex, $sSubst)
MsgBox($MB_SYSTEMMODAL, "Result", $sResult)
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for AutoIt, please visit: https://www.autoitscript.com/autoit3/docs/functions/StringRegExp.htm