3v4l.org

run code in 300+ PHP versions simultaneously
<?php function v1($value) { return implode(array_map(function($value) { return ucfirst($value); }, explode('_', $value))); } function v2($value) { return preg_replace_callback('/([A-Z])/', function($char) { return '_'.strtolower($char[1]); }, lcfirst($value)); } function v3($value){ return preg_replace('/_(.?)/e',"strtoupper('$1')",$value); } for($x = 0; $x < 10000; $x++){ $foo = v2('foo_bar_baz_bee'); if($x = 0) echo $foo; }
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.37, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6

Process exited with code 137.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION, expecting ')' in /in/FUvZc on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION, expecting ')' in /in/FUvZc on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/FUvZc on line 3
Process exited with code 255.
preferences:
206.16 ms | 401 KiB | 350 Q