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run code in 150+ php & hhvm versions
Bugs & Features
<?php class Mediator { protected $events = array(); public function attach($eventName, $callback) { if (!isset($this->events[$eventName])) { $this->events[$eventName] = array(); } $this->events[$eventName][] = $callback; } public function trigger($eventName, $data = null) { foreach ($this->events[$eventName] as $callback) { $callback($eventName, $data); } } } ?>
Output for 5.0.0 - 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
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/UCqqr on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/UCqqr on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/UCqqr on line 4
Process exited with code 255.