3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php var_dump(preg_match('^\\d{4}$', 2013));
Output for 4.3.11 - 5.6.28, 7.0.0 - 7.1.0
Warning: preg_match(): No ending delimiter '^' found in /in/qYGrW on line 2 bool(false)
Output for hhvm-3.10.0 - 3.12.0
Warning: No ending delimiter '^' found: [^\d{4}$] in /in/qYGrW on line 2 bool(false)
Output for 4.3.0 - 4.3.10
Warning: No ending delimiter '^' found in /in/qYGrW on line 2 bool(false)