#34562 [Bgs->Opn]: Backslash escaping doesn't work

ID: 34562 Updated by: techtonik@php.net Reported By: techtonik@php.net -Status: Bogus +Status: Open -Bug Type: PCRE related +Bug Type: Documentation problem Operating System: Windows 2000 PHP Version: 4.4.0 New Comment: Ok, the problem is what PHP makes additional escaping of backslashes and it is not mentioned in PCRE syntax pages. http://www.php.net/manual/en/reference.pcre.pattern.syntax.php#regexp.reference.backslash It must be noted to use '\\\\' for backslash since PHP escapes backslash in strings before making regular expressions from them. Previous Comments: ------------------------------------------------------------------------ [2005-09-20 13:16:52] sniper@php.net Sorry, but your problem does not imply a bug in PHP itself. For a list of more appropriate places to ask for help using PHP, please visit http://www.php.net/support.php as this bug system is not the appropriate forum for asking support questions. Due to the volume of reports we can not explain in detail here why your report is not a bug. The support channels will be able to provide an explanation for you. Thank you for your interest in PHP. ------------------------------------------------------------------------ [2005-09-20 13:11:34] techtonik@php.net Description: ------------ Usually, if you want to match a backslash, you write "\\", but this doesn't work no matter what kind of quotes do you use. Reproduce code: --------------- <?php $str = 'slash\replace'; echo $str = preg_replace('!\\+!', '/', $str); preg_replace('![/\\]+!', '/', $str); // warning ?> Expected result: ---------------- slash/replace Actual result: -------------- slash\replace Warning: preg_replace(): Compilation failed: missing terminating ] for character class at offset 5 i n C:\MyFiles.XFiles\Numerald\tc\test69\testcase.php on line 7 ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=34562&edit=1