3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function event($name,$cb = null){ static $e = array(); if ( is_callable($cb) ){ empty( $e[$name] ) ? $e[$name] = [$cb] : $e[$name][] = $cb; } elseif ( false === empty($e[$name]) ) { $a = is_array($cb) ? $cb : []; foreach ($e[$name] as $eh) call_user_func_array($eh,$a); } }
Output for 5.4.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/rHtjg on line 5
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 '[' in /in/rHtjg on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/rHtjg on line 5
Process exited with code 255.