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

Edit report at https://bugs.php.net/bug.php?id=76188&edit=1 ID: 76188 Updated by: cmb@php.net Reported by: andi at splitbrain dot org Summary: Change in treating unescaped - in character classes Status: Open Type: Bug Package: PCRE related Operating System: Linux PHP Version: master-Git-2018-04-05 (Git) Block user comment: N Private report: N New Comment: That's likely a behavioral difference between PCRE and PCRE2. Previous Comments: ------------------------------------------------------------------------ [2018-04-05 15:18:11] andi at splitbrain dot org 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 this bug report at https://bugs.php.net/bug.php?id=76188&edit=1