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<?php echo preg_replace_callback('/([a-z])(_[a-z])/', function($u) { //var_dump($u); return $u[1].ucwords(str_replace('_', '', $u[2])); } , 'rob_tr_yuui'); echo PHP_EOL; echo preg_replace('/([a-z])(_[a-z])/', '$1$2', 'rob_tr_yuui'); function to_camel_case($str, $capitalise_first_char = false) { if($capitalise_first_char) { $str[0] = strtoupper($str[0]); } $func = create_function('$c', 'return strtoupper($c[1]);'); return preg_replace_callback('/_([a-z])/', $func, $str); } echo PHP_EOL; echo to_camel_case('rob_tr_yuui');
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
robTrYuui rob_tr_yuui Fatal error: Uncaught Error: Call to undefined function create_function() in /in/QduQl:37 Stack trace: #0 /in/QduQl(49): to_camel_case('rob_tr_yuui') #1 {main} thrown in /in/QduQl on line 37
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33
robTrYuui rob_tr_yuui Deprecated: Function create_function() is deprecated in /in/QduQl on line 37 robTrYuui
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 - 7.1.25, 7.3.32 - 7.3.33, 7.4.26
robTrYuui rob_tr_yuui robTrYuui
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 in /in/QduQl on line 6
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 in /in/QduQl on line 6
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/QduQl on line 6
Process exited with code 255.
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259.64 ms | 401 KiB | 366 Q