3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function encode($str) { return preg_replace_callback('/(.)\1*/', function($match) { return strlen($match[1]) . $match[2]; }, $str); } function decode($str) { return preg_replace_callback('/(\d+)(\D)/', function($match) { return str_repeat($match[2], $match[1]); }, $str); } echo encode('WWWWWWWWWWWWBWWWWWWWWWWWWBBBWWWWWWWWWWWWWWWWWWWWWWWWBWWWWWWWWWWWWWW'), "\n"; echo decode('12W1B12W3B24W1B14W'), "\n";
Output for 5.3.0 - 5.6.28, 7.0.0 - 7.1.0
Notice: Undefined offset: 2 in /in/7nMse on line 3 Notice: Undefined offset: 2 in /in/7nMse on line 3 Notice: Undefined offset: 2 in /in/7nMse on line 3 Notice: Undefined offset: 2 in /in/7nMse on line 3 Notice: Undefined offset: 2 in /in/7nMse on line 3 Notice: Undefined offset: 2 in /in/7nMse on line 3 Notice: Undefined offset: 2 in /in/7nMse on line 3 1111111 WWWWWWWWWWWWBWWWWWWWWWWWWBBBWWWWWWWWWWWWWWWWWWWWWWWWBWWWWWWWWWWWWWW
Output for hhvm-3.10.0 - 3.12.0
Notice: Undefined index: 2 in /in/7nMse on line 3 Notice: Undefined index: 2 in /in/7nMse on line 3 Notice: Undefined index: 2 in /in/7nMse on line 3 Notice: Undefined index: 2 in /in/7nMse on line 3 Notice: Undefined index: 2 in /in/7nMse on line 3 Notice: Undefined index: 2 in /in/7nMse on line 3 Notice: Undefined index: 2 in /in/7nMse on line 3 1111111 WWWWWWWWWWWWBWWWWWWWWWWWWBBBWWWWWWWWWWWWWWWWWWWWWWWWBWWWWWWWWWWWWWW
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/7nMse on line 3
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/7nMse on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/7nMse on line 3
Process exited with code 255.