3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php echo preg_replace_callback('~[A-Z]~', function($_) { return chr(32 + ord($_[0])); }, '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 5.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
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 5.2.3 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/Me1NW on line 2
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.2
<br /> <b>Parse error</b>: syntax error, unexpected T_FUNCTION in <b>/in/Me1NW</b> on line <b>2</b><br />
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
<br /> <b>Parse error</b>: parse error, unexpected T_FUNCTION in <b>/in/Me1NW</b> on line <b>2</b><br />
Process exited with code 255.
Output for 4.3.2 - 4.3.4
<br /> <b>Parse error</b>: parse error in <b>/in/Me1NW</b> on line <b>2</b><br />
Process exited with code 255.