3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = 1; echo ($$a + $a++); $a = 1; printf ("%s",($a + $a + $a + $a++));
Output for 5.6.0 - 5.6.30, hhvm-3.18.5 - 3.21.3, 7.0.0 - 7.3.0beta1
Notice: Undefined variable: 1 in /in/LHRqe on line 5 14
Output for hhvm-3.22.0
Notice: Undefined variable: 1 in /in/LHRqe on line -1 14