3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php class A {} class B extends A {} var_dump(is_a('A','B')); var_dump(is_a('B','A')); var_dump(is_subclass_of('A','B')); var_dump(is_subclass_of('B','A')); var_dump(is_subclass_of('A','A'));
Output for 5.3.0 - 5.3.6, 5.3.9 - 7.1.0
bool(false) bool(false) bool(false) bool(true) bool(false)
Output for 5.3.7 - 5.3.8
bool(false) bool(true) bool(false) bool(true) bool(false)
Output for 5.0.3 - 5.2.17
Strict Standards: is_a(): Deprecated. Please use the instanceof operator in /in/JZrdW on line 5 bool(false) Strict Standards: is_a(): Deprecated. Please use the instanceof operator in /in/JZrdW on line 6 bool(false) bool(false) bool(true) bool(false)
Output for 5.0.0 - 5.0.2
Strict Standards: is_a(): Deprecated. Please use the instanceof operator in /in/JZrdW on line 5 bool(false) Strict Standards: is_a(): Deprecated. Please use the instanceof operator in /in/JZrdW on line 6 bool(false) bool(false) bool(false) bool(false)
Output for 4.3.0 - 4.4.9
bool(false) bool(false) bool(false) bool(false) bool(false)