3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php function event($name,$cb = null){ static $e = array(); if ( is_callable($cb) ){ empty( $e[$name] ) ? $e[$name] = array($cb) : $e[$name][] = $cb; } elseif ( false === empty($e[$name]) ) { $a = is_array($cb) ? $cb : array(); foreach ($e[$name] as $eh) call_user_func_array($eh,$a); } }
Output for 4.3.0 - 7.1.7