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<?php interface GrandparentInterface {} interface ParentInterface extends GrandparentInterface {} class X implements ParentInterface {} var_dump(is_subclass_of('X', 'ParentInterface')); var_dump(is_subclass_of('X', 'GrandparentInterface'));
Output for 5.3.7 - 7.1.0
bool(true) bool(true)
Output for 5.0.0 - 5.3.6
bool(false) bool(false)
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING in /in/BAb0f on line 2
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/BAb0f on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/BAb0f on line 2
Process exited with code 255.