3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = array('test_1' => '1'); $b = 'test_'; echo $a->{$b . 1};
Output for 5.0.0 - 7.1.0
Notice: Trying to get property of non-object in /in/3glJE on line 4
Output for 4.3.0 - 4.4.9