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run code in 200+ php & hhvm versions
Bugs & Features
<?php var_dump(preg_match('/(?<bar>o)\g{bar}/', 'foo'));
based on tfeSh
Output for 4.4.9, 5.2.4 - 7.2.0
int(1)
Output for 4.4.6 - 4.4.8, 5.2.2 - 5.2.3
Warning: preg_match(): Compilation failed: \g is not followed by an (optionally braced) non-zero number at offset 9 in /in/bLkLu on line 3 bool(false)
Output for 4.3.11 - 4.4.5, 5.0.0 - 5.2.1
Warning: preg_match(): Compilation failed: unrecognized character after (?< at offset 3 in /in/bLkLu on line 3 bool(false)
Output for 4.3.0 - 4.3.10
Warning: Compilation failed: unrecognized character after (?< at offset 3 in /in/bLkLu on line 3 bool(false)