3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php echo preg_replace('/(_[a-z])/g', function($u) { return str_replace('', '_', strtoupper($u)); } );
Output for 7.0.0 - 7.1.0
Warning: preg_replace() expects at least 3 parameters, 2 given in /in/WmngX on line 14
Output for 5.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0
Warning: preg_replace() expects at least 3 parameters, 2 given in /in/WmngX on line 15
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/WmngX on line 6
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/WmngX on line 6
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/WmngX on line 6
Process exited with code 255.