hphp/test/quick/Unset.php

   1 <?hh
   2
   3 function f() {
   4   global $y;
   5
   6   print ":".isset($x).":\n";
   7   print ":".isset($y).":\n";
   8
   9   unset($x);
  10   unset($y);
  11   print ":".isset($x).":\n";
  12   print ":".isset($y).":\n";
  13
  14   $x = 0;
  15   $y = 0;
  16   print ":".isset($x).":\n";
  17   print ":".isset($y).":\n";
  18
  19   unset($x);
  20   unset($y);
  21   print ":".isset($x).":\n";
  22   print ":".isset($y).":\n";
  23 }
  24 f();
  25
  26 class A {
  27   public function foo() {
  28     unset($this);
  29   }
  30 }
  31 $obj = new A;
  32 $obj->foo();