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<?php echo Module::work('hello world'), "\n"; echo call_user_func('Module::work', 'hello world'); abstract class Module { public static function work($it) { return strtoupper($it); } }
Output for 5.2.14 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
HELLO WORLD HELLO WORLD