#30071 [NEW]: Many problems with Perl-Compatible Regular Expressions

From: wesleywex at gmail dot com Operating system: Windows 2000 SP4 PHP version: 4.3.9RC2 PHP Bug Type: PCRE related Bug description: Many problems with Perl-Compatible Regular Expressions Description: ------------ I'm trying to replace some multiple tags like <wsb></wsb> and <wsimg> with only one regex. While I was using few tags, I saw no problem (what indicates that the regex is valid), but when the tags reaches some unknown limit, the system makes very odd things, like: - Not parsing correctly the text - Taking much more time to proccess the script if just one small new line is inserted You can see theese glitches in 3 files I've prepared. All 3 have similar contents, I just changed one line between them. Reproduce code: --------------- Variations: 1: http://wstec.net/tmp/php_bug_pcre_02/code_01.txt 2: http://wstec.net/tmp/php_bug_pcre_02/code_02.txt 3: http://wstec.net/tmp/php_bug_pcre_02/code_03.txt Actual result: -------------- Attention to the line with the <wsx /> 1: http://wstec.net/tmp/php_bug_pcre_02/code_01.php - Took more than 1 second to parse the text only 2 times - Parsed everything as it should be parsed - Note that there aren't spaces in the text among <!-- and --> 2: http://wstec.net/tmp/php_bug_pcre_02/code_02.php - Took more than 1 second to parse the text only 1 time - Not everything that should be parsed was - Note the only difference is the spaces in the text among <!-- and --> 3: http://wstec.net/tmp/php_bug_pcre_02/code_03.php - Took less than 1 second to parse the text the same 2 times than the firs scipt - Parsed everything as it should be parsed - Note that the only difference between the previous scripts is that line starting with <wsx /> I hope you understand the issue now -- Edit bug report at http://bugs.php.net/?id=30071&edit=1 -- Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=30071&r=trysnapshot4 Try a CVS snapshot (php5.0): http://bugs.php.net/fix.php?id=30071&r=trysnapshot50 Try a CVS snapshot (php5.1): http://bugs.php.net/fix.php?id=30071&r=trysnapshot51 Fixed in CVS: http://bugs.php.net/fix.php?id=30071&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=30071&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=30071&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=30071&r=needscript Try newer version: http://bugs.php.net/fix.php?id=30071&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=30071&r=support Expected behavior: http://bugs.php.net/fix.php?id=30071&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=30071&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=30071&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=30071&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=30071&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=30071&r=dst IIS Stability: http://bugs.php.net/fix.php?id=30071&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=30071&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=30071&r=float MySQL Configuration Error: http://bugs.php.net/fix.php?id=30071&r=mysqlcfg