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<?php class Connection {} class Singleton{ static public function get_instance(){ static $i; $i ?: $i = new Connection(); return $i; } } class A extends Singleton{} class B extends A{} var_dump(A::get_instance()); var_dump(B::get_instance());
Output for git.master, git.master_jit, rfc.property-hooks
object(Connection)#1 (0) { } object(Connection)#1 (0) { }

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