Bug #76188 [NEW]: Change in treating unescaped - in character classes

From: andi at splitbrain dot org Operating system: Linux PHP version: master-Git-2018-04-05 (Git) Package: PCRE related Bug Type: Bug Bug description:Change in treating unescaped - in character classes Description: ------------ In regular expressions an unescaped minus character (-) in character classes is usually used to declare a range. However when the range makes no sense, it is treated as a literal minus character. This seems still to be true for most occasions in 7.3-dev except for one special combination, where the minus sits between a shortcut character class and a dollar sign. Eg. /[\w-$]/. Previous PHP versions would treat this as word characters, minus and dollar. PHP 7.3-dev throws an error. Test script: --------------- <?php $tests = [ '/[\w-$]/', '/[\w-]/', '/[-\w]/', '/[$-]/', '/[-$]/', ]; echo PHP_VERSION; echo "\n"; foreach($tests as $test) { echo "$test\n"; preg_match($test,''); } Expected result: ---------------- 7.2.3 /[\w-$]/ /[\w-]/ /[-\w]/ /[$-]/ /[-$]/ Actual result: -------------- 7.3.0-dev /[\w-$]/ Warning: preg_match(): Compilation failed: invalid range in character class at offset 3 in /var/www/test.php on line 16 /[\w-]/ /[-\w]/ /[$-]/ /[-$]/ -- Edit bug report at https://bugs.php.net/bug.php?id=76188&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=76188&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=76188&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=76188&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=76188&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=76188&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=76188&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=76188&r=needscript Try newer version: https://bugs.php.net/fix.php?id=76188&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=76188&r=support Expected behavior: https://bugs.php.net/fix.php?id=76188&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=76188&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=76188&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=76188&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=76188&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=76188&r=dst IIS Stability: https://bugs.php.net/fix.php?id=76188&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=76188&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=76188&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=76188&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=76188&r=mysqlcfg