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<?php /* class Foo { public static function barStatic() { } public function bar() { } } $foo = new Foo(); var_dump(is_callable(array($foo, 'bar'))); var_dump(is_callable(array($foo, 'barStatic'))); var_dump(is_callable(array('Foo', 'bar'))); var_dump(is_callable(array('Foo', 'barStatic'))); var_dump(is_callable('Foo::bar')); var_dump(is_callable('Foo::barStatic')); */ var_dump(is_callable('ReflectionMethod::setAccessible')); var_dump(is_callable(array('ReflectionMethod', 'setAccessible'));