3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $testing = 'foo'; $array = ['bar' => 'testing']; echo ${$array['bar']}; echo $$array['bar'];
based on kcP8R
Output for hhvm-3.15.4, 7.0.0 - 7.2.8
foo Notice: Array to string conversion in /in/YNvdA on line 7 Notice: Undefined variable: Array in /in/YNvdA on line 7
Output for 5.6.0 - 5.6.30
foofoo