class c1 public function init echo inited function test1 global if iss

class c1 {

        public function init() {
            echo "inited\n";
        }
    }


    function test1() {
        global $c;

        if(!isset($c)) {
            $c= new c1;
            $c->init();
         }
    }

    function test2() {
        global $c;

        if(!isset($c)) {
            $c= new c1;
            $c->init();
         }
    }

    global $c;

    test1();
    test2();
    test1();