3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php preg_match('#/(?<123>.+)#', '/foo');
Output for 5.4.41 - 5.6.28, 7.0.0 - 7.1.0
Warning: preg_match(): Compilation failed: group name must start with a non-digit at offset 4 in /in/I4Grc on line 3
Output for hhvm-3.10.0 - 3.12.0
Warning: Compilation failed: group name must start with a non-digit at offset 4 in /in/I4Grc on line 3
Output for 5.2.2 - 5.4.40
Warning: preg_match(): Numeric named subpatterns are not allowed in /in/I4Grc on line 3
Output for 4.3.11 - 4.4.5, 5.0.0 - 5.2.1
Warning: preg_match(): Compilation failed: unrecognized character after (?< at offset 4 in /in/I4Grc on line 3
Output for 4.4.6 - 4.4.9
Output for 4.3.0 - 4.3.10
Warning: Compilation failed: unrecognized character after (?< at offset 4 in /in/I4Grc on line 3