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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('_convertToCamelCase'), $key);
based on NUt0d
Output for 7.0.0 - 7.1.0
Warning: preg_replace_callback(): Requires argument 2, 'Array', to be a valid callback in /in/huDCK on line 12 valami_underscored_cucc
Output for 5.2.0 - 5.6.28
Warning: preg_replace_callback(): Requires argument 2, 'Array', to be a valid callback in /in/huDCK on line 13 valami_underscored_cucc
Output for 5.1.0 - 5.1.6
Warning: preg_replace_callback(): requires argument 2, 'Array', to be a valid callback in /in/huDCK 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/huDCK 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/huDCK 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/huDCK on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/huDCK on line 3
Process exited with code 255.