From: chris_se at gmx dot net Operating system: Linux PHP version: 4.3.4 PHP Bug Type: PCRE related Bug description: Using ! as a delimiter for regexps will not allow neg. lookahead assertions
Description: ------------ When I try to use ! as delimiter and use a negative lookahead assertion which is normally started with (?!, (?! of course does not work, because the ! will terminate the pattern (and PHP will of course complain). But when I try to escape the exclamation mark like (?\!, an error occurs. I assume the \ is not removed in front of the ! after the pattern is freed from its delimiters. Reproduce code: --------------- $res = preg_match ("!^(?\\!foo)[a-z]{3}$!", "bar"); Expected result: ---------------- $res contains true Actual result: -------------- Warning: Compilation failed: unrecognized character after (? at offset 3 in /home/christian/- on line 2 -- Edit bug report at http://bugs.php.net/?id=26854&edit=1 -- Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=26854&r=trysnapshot4 Try a CVS snapshot (php5): http://bugs.php.net/fix.php?id=26854&r=trysnapshot5 Fixed in CVS: http://bugs.php.net/fix.php?id=26854&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=26854&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=26854&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=26854&r=needscript Try newer version: http://bugs.php.net/fix.php?id=26854&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=26854&r=support Expected behavior: http://bugs.php.net/fix.php?id=26854&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=26854&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=26854&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=26854&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=26854&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=26854&r=dst IIS Stability: http://bugs.php.net/fix.php?id=26854&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=26854&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=26854&r=float