3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php class Events { private $events; public function add($event, callable $callback) { $this->events[$event][] = $callback; } public function run($event, array $args = []) { if (!isset($this->events[$event])) { return; } foreach ($this->events[$event] as $e) { call_user_func_array($e, $args); } } } $testVar = 1; $events = new Events; $events->add('test', function(&$var) { $var = 2; }); $events->run('test', [&$testVar]); echo $testVar;
Output for 5.4.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
2
Output for 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/GVlsG on line 11
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_ARRAY, expecting '&' or T_VARIABLE in /in/GVlsG on line 11
Process exited with code 255.
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/GVlsG on line 5
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/GVlsG on line 5
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/GVlsG on line 5
Process exited with code 255.