3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function _convertToCamelCase(array $matches) { return ucfirst($matches[1]); } $key = 'valami_underscored_cucc'; echo preg_replace_callback( '/_(\w)/', array($this, '_convertToCamelCase'), $key);
Output for 7.1.0
Fatal error: Uncaught Error: Using $this when not in object context in /in/NUt0d:12 Stack trace: #0 {main} thrown in /in/NUt0d on line 12
Process exited with code 255.
Output for 7.0.0 - 7.0.14
Notice: Undefined variable: this in /in/NUt0d on line 12 Warning: preg_replace_callback(): Requires argument 2, 'Array', to be a valid callback in /in/NUt0d on line 12 valami_underscored_cucc
Output for hhvm-3.10.0 - 3.12.0
Notice: Undefined variable: this in /in/NUt0d on line 12 Notice: Array to string conversion in /in/NUt0d on line 13 Warning: Not a valid callback function Array in /in/NUt0d on line 13
Output for 5.2.0 - 5.6.28
Notice: Undefined variable: this in /in/NUt0d on line 12 Warning: preg_replace_callback(): Requires argument 2, 'Array', to be a valid callback in /in/NUt0d on line 13 valami_underscored_cucc
Output for 5.1.0 - 5.1.6
Notice: Undefined variable: this in /in/NUt0d on line 12 Warning: preg_replace_callback(): requires argument 2, 'Array', to be a valid callback in /in/NUt0d on line 13 valami_underscored_cucc
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_ARRAY, expecting '&' or T_VARIABLE in /in/NUt0d on line 3
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_ARRAY, expecting ')' in /in/NUt0d on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_ARRAY, expecting ')' in /in/NUt0d on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/NUt0d on line 3
Process exited with code 255.