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<?php interface Foo {} class Bar implements Foo {} var_dump(is_a('Bar', 'Foo', true)); var_dump(class_implements('Bar'));
based on SrEPo
Output for 5.3.9 - 7.2.0
bool(true) array(1) { ["Foo"]=> string(3) "Foo" }
Output for 5.3.0 - 5.3.8
Warning: is_a() expects exactly 2 parameters, 3 given in /in/k6Hva on line 6 NULL array(1) { ["Foo"]=> string(3) "Foo" }
Output for 5.1.0 - 5.2.17
Strict Standards: is_a(): Deprecated. Please use the instanceof operator in /in/k6Hva on line 6 Warning: Wrong parameter count for is_a() in /in/k6Hva on line 6 NULL array(1) { ["Foo"]=> string(3) "Foo" }
Output for 5.0.0 - 5.0.5
Strict Standards: is_a(): Deprecated. Please use the instanceof operator in /in/k6Hva on line 6 Warning: Wrong parameter count for is_a() in /in/k6Hva on line 6 NULL Warning: class_implements() expects parameter 1 to be object, string given in /in/k6Hva on line 7 bool(false)
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING in /in/k6Hva on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING in /in/k6Hva on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/k6Hva on line 3
Process exited with code 255.