3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $number = 43; $substitutes = range('a', 'j'); $formatted = sprintf('%010d', $number); $string = preg_replace_callback('.', function ($m) use ($substitutes) { return $substitutes[$m[0]]; }, $formatted); echo $string;
Output for 5.3.0 - 5.6.28, 7.0.0 - 7.1.0
Warning: preg_replace_callback(): No ending delimiter '.' found in /in/PqJB6 on line 9
Output for hhvm-3.12.0
Warning: No ending delimiter '.' found: [.] in /in/PqJB6 on line 9
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/PqJB6 on line 7
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/PqJB6 on line 7
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/PqJB6 on line 7
Process exited with code 255.