3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php function func($x, $x=1, $x=2) { return $x; } echo func(3);
based on LRVjE
Output for 7.0.0 - 7.0.1
Fatal error: Redefinition of parameter $x in /in/HBoss on line 3
Process exited with code 255.
Output for 5.3.21 - 5.6.28
2