1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
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();