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<?php class Foo { public static function bar($a) { var_dump("5$a"); } } call_user_func(['Foo', 'bar'], 'asdf'); call_user_func('Foo::bar', 'qwer');
Output for git.master, git.master_jit, rfc.property-hooks
string(5) "5asdf" string(5) "5qwer"

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