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<?php function _convertToCamelCase(array $matches) { return ucfirst($matches[1]); } $key = 'valami_underscored_cucc'; echo preg_replace_callback( '/_(\w)/', array('_convertToCamelCase'), $key);
Output for 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Fatal error: Uncaught TypeError: preg_replace_callback(): Argument #2 ($callback) must be a valid callback, array callback must have exactly two members in /in/huDCK:10 Stack trace: #0 /in/huDCK(10): preg_replace_callback('/_(\\w)/', Array, 'valami_undersco...') #1 {main} thrown in /in/huDCK on line 10
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27
Fatal error: Uncaught TypeError: preg_replace_callback(): Argument #2 ($callback) must be a valid callback, array must have exactly two members in /in/huDCK:13 Stack trace: #0 /in/huDCK(13): preg_replace_callback('/_(\\w)/', Array, 'valami_undersco...') #1 {main} thrown in /in/huDCK on line 13
Process exited with code 255.
Output for 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.20, 7.1.5 - 7.1.20, 7.2.6 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33
Warning: preg_replace_callback(): Requires argument 2, 'Array', to be a valid callback in /in/huDCK on line 13 valami_underscored_cucc
Output for 7.0.0 - 7.0.14, 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 5.1.0 - 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 - 4.3.11, 4.4.0 - 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.

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