3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php is_a("kkk", string);
Output for 4.3.0 - 4.4.9, 5.3.0 - 7.1.0
Notice: Use of undefined constant string - assumed 'string' in /in/v55mk on line 3
Output for 5.0.0 - 5.2.17
Notice: Use of undefined constant string - assumed 'string' in /in/v55mk on line 3 Strict Standards: is_a(): Deprecated. Please use the instanceof operator in /in/v55mk on line 3