3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php class A { } class B extends A { } $x = 'B'; var_dump( is_subclass_of( $x, A ) );
Output for 5.0.3 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
Notice: Use of undefined constant A - assumed 'A' in /in/0JdnM on line 12 bool(true)
Output for hhvm-3.10.0
Notice: Use of undefined constant A - assumed 'A' in /in/0JdnM on line -1 bool(true)
Output for 4.3.0 - 5.0.2
Notice: Use of undefined constant A - assumed 'A' in /in/0JdnM on line 12 bool(false)