3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $x = 1; //+= -= *= none /= %= **=.= none&= |= none<<= >>= &= |= ^= $x <<= 2; echo $x;
based on PSOrp
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
4