3v4l.org

run code in 300+ PHP versions simultaneously
<?php class foo implements ArrayAccess { public function offsetSet($offset, $value) { var_dump(__METHOD__); } public function offsetExists($var) { var_dump(__METHOD__); if ($var == "foobar") { return true; } return false; } public function offsetUnset($var) { var_dump(__METHOD__); } public function offsetGet($var) { var_dump(__METHOD__); return "value"; } } $foo = new foo(); $foo['bar'] = 1; var_dump(array_key_exists('bar', $foo));

preferences:
82.64 ms | 402 KiB | 5 Q