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<?php class x implements ArrayAccess { } $o = new x(); var_dump(isset($o[0]));
based on h3XE3
Output for 7.0.0 - 7.2.0
Fatal error: Class x contains 4 abstract methods and must therefore be declared abstract or implement the remaining methods (ArrayAccess::offsetExists, ArrayAccess::offsetGet, ArrayAccess::offsetSet, ...) in /in/EqXDe on line 2
Process exited with code 255.
Output for 5.3.18 - 5.6.28
Fatal error: Class x contains 4 abstract methods and must therefore be declared abstract or implement the remaining methods (ArrayAccess::offsetExists, ArrayAccess::offsetGet, ArrayAccess::offsetSet, ...) in /in/EqXDe on line 3
Process exited with code 255.