3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php var_dump(is_a(null, 'test'));
Output for 4.3.0 - 4.4.9, 5.3.0 - 7.1.10
bool(false)
Output for 5.0.0 - 5.2.17
Strict Standards: is_a(): Deprecated. Please use the instanceof operator in /in/Qb76v on line 2 bool(false)