3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $text = "33,abc: A programming language"; $result = preg_replace_callback('/^([^a-z]*)([a-z])/i', function($m) { return $m[1].strtoupper($m[2]); }, $text); echo $result;
based on ImcfH
Output for 5.3.0 - 7.1.0
33,Abc: A programming language
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/sIfOs on line 4
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/sIfOs on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/sIfOs on line 4
Process exited with code 255.