3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php class X { public function __construct($a = 0) { $a = 33; $this->a(); } protected function a () { echo $a.'x'; var_dump(get_defined_vars()); } }
based on mXPiE
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.2.0