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

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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();