3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $r = 1; $tr = $R + 5; echo $r ."\n"; ++$r; echo $r ."\n";
Output for 5.0.4 - 7.2.0
Notice: Undefined variable: R in /in/PI5YE on line 4 1 2
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: R in /in/PI5YE on line 4 1 2