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run code in 150+ php & hhvm versions
Bugs & Features
<?php echo preg_replace_callback('~[A-Z]~', function($_) { return $_[0] + 32; }, 'Important: you are NOT allowed to use a built-in function that converts the string (or just one character) to lowercase (such as ToLower() in .NET, strtolower() in PHP , ...)! You\'re allowed to use all other built-in functions, however.');
Output for 7.1.0
Warning: A non-numeric value encountered in /in/P23AV on line 2 Warning: A non-numeric value encountered in /in/P23AV on line 2 Warning: A non-numeric value encountered in /in/P23AV on line 2 Warning: A non-numeric value encountered in /in/P23AV on line 2 Warning: A non-numeric value encountered in /in/P23AV on line 2 Warning: A non-numeric value encountered in /in/P23AV on line 2 Warning: A non-numeric value encountered in /in/P23AV on line 2 Warning: A non-numeric value encountered in /in/P23AV on line 2 Warning: A non-numeric value encountered in /in/P23AV on line 2 Warning: A non-numeric value encountered in /in/P23AV on line 2 Warning: A non-numeric value encountered in /in/P23AV on line 2 Warning: A non-numeric value encountered in /in/P23AV on line 2 Warning: A non-numeric value encountered in /in/P23AV on line 2 32mportant: you are 323232 allowed to use a built-in function that converts the string (or just one character) to lowercase (such as 32o32ower() in .323232, strtolower() in 323232 , ...)! 32ou're allowed to use all other built-in functions, however.
Output for 5.3.0 - 7.0.14
32mportant: you are 323232 allowed to use a built-in function that converts the string (or just one character) to lowercase (such as 32o32ower() in .323232, strtolower() in 323232 , ...)! 32ou're allowed to use all other built-in functions, however.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/P23AV on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/P23AV on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/P23AV on line 2
Process exited with code 255.