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<?php error_reporting(-1); interface IDoSomething { public static function doSomething(); } class One implements IDoSomething { public static function doSomething() { echo "One is doing something\n"; } } class Two extends One { public static function doSomething() { echo "Two is doing something\n"; } } function example(IDoSomething $doer) { $doer->doSomething(); } example(new One()); // One is doing something example(new Two()); // Two is doing something
Output for git.master, git.master_jit, rfc.property-hooks
One is doing something Two is doing something

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