3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = 1; $b = null; function test ($a, $b, $b) {}
based on Dsf7Q
Output for 7.0.0 - 7.0.1
Fatal error: Redefinition of parameter $b in /in/TJJ5G on line 6
Process exited with code 255.
Output for 5.3.21 - 5.6.28