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run code in 200+ php & hhvm versions
Bugs & Features
<?php class Foo {} class Bar extends Foo {} var_dump(is_a('Foo', 'Bar')); var_dump(is_a('Bar', 'Foo')); var_dump(is_subclass_of('Foo', 'Bar')); var_dump(is_subclass_of('Bar', 'Foo'));
based on buNVo
Output for 5.3.0 - 5.3.6, 5.3.9 - 7.2.0
bool(false) bool(false) bool(false) bool(true)
Output for 5.3.7 - 5.3.8
bool(false) bool(true) bool(false) bool(true)
Output for 5.0.3 - 5.2.17
Strict Standards: is_a(): Deprecated. Please use the instanceof operator in /in/uJm4h on line 6 bool(false) Strict Standards: is_a(): Deprecated. Please use the instanceof operator in /in/uJm4h on line 7 bool(false) bool(false) bool(true)
Output for 5.0.0 - 5.0.2
Strict Standards: is_a(): Deprecated. Please use the instanceof operator in /in/uJm4h on line 6 bool(false) Strict Standards: is_a(): Deprecated. Please use the instanceof operator in /in/uJm4h on line 7 bool(false) bool(false) bool(false)
Output for 4.3.0 - 4.4.9
bool(false) bool(false) bool(false) bool(false)