3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php class A {} class B extends A{} class C extends B{} $b = 'B'; var_dump(is_subclass_of('A', 'A'), is_subclass_of('B', 'A'), is_subclass_of($b, 'A')); var_dump(is_a('A', 'A', true), is_a('B', 'A', true), is_a($b, 'A', true)); $className = 'C'; $parentClass = $className; while($_parentClass = get_parent_class($parentClass)) $parentClass = $_parentClass;
Output for 5.3.9 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
bool(false) bool(true) bool(true) bool(true) bool(true) bool(true)
Output for 5.3.0 - 5.3.8
bool(false) bool(true) bool(true) Warning: is_a() expects exactly 2 parameters, 3 given in /in/olScI on line 9 Warning: is_a() expects exactly 2 parameters, 3 given in /in/olScI on line 9 Warning: is_a() expects exactly 2 parameters, 3 given in /in/olScI on line 9 NULL NULL NULL
Output for 5.0.3 - 5.2.17
bool(false) bool(true) bool(true) Strict Standards: is_a(): Deprecated. Please use the instanceof operator in /in/olScI on line 9 Warning: Wrong parameter count for is_a() in /in/olScI on line 9 Strict Standards: is_a(): Deprecated. Please use the instanceof operator in /in/olScI on line 9 Warning: Wrong parameter count for is_a() in /in/olScI on line 9 Strict Standards: is_a(): Deprecated. Please use the instanceof operator in /in/olScI on line 9 Warning: Wrong parameter count for is_a() in /in/olScI on line 9 NULL NULL NULL
Output for 5.0.0 - 5.0.2
bool(false) bool(false) bool(false) Strict Standards: is_a(): Deprecated. Please use the instanceof operator in /in/olScI on line 9 Warning: Wrong parameter count for is_a() in /in/olScI on line 9 Strict Standards: is_a(): Deprecated. Please use the instanceof operator in /in/olScI on line 9 Warning: Wrong parameter count for is_a() in /in/olScI on line 9 Strict Standards: is_a(): Deprecated. Please use the instanceof operator in /in/olScI on line 9 Warning: Wrong parameter count for is_a() in /in/olScI on line 9 NULL NULL NULL
Output for 4.3.0 - 4.4.9
bool(false) bool(false) bool(false) Warning: Wrong parameter count for is_a() in /in/olScI on line 9 Warning: Wrong parameter count for is_a() in /in/olScI on line 9 Warning: Wrong parameter count for is_a() in /in/olScI on line 9 NULL NULL NULL