引用定位

时间：2011-05-16 15:55:57 来源：站内作者：潘春会

$key = uniqid("is_ref_", true);
      } while(in_array($key, $obj1));

      //The two variables differ in content ... They can't be the same
      if(in_array($key, $obj2)) {
      return false;
      }

      //The arrays point to the same data if changes are reflected in $var2
      $data = uniqid("is_ref_data_", true);
      $var1->$key =& $data;
      //There seems to be a modification ...
      if(isset($var2->$key)) {
      if($var2[$key] === $data) {
      $same = true;
      }
      }

      //Undo our changes ...
      unset($var1->$key);
    } elseif (is_resource($var1)) {
      if(get_resource_type($var1) !== get_resource_type($var2)) {
      return false;
      }

      return ((string) $var1) === ((string) $var2);
    } else {
      //Simple variables ...
      if($var1!==$var2) {
      //Data mismatch ... They can't be the same ...
      return false;
      }

      //To check for a reference of a variable with simple type
      //simply store its old value and check against modifications of the second variable ;-)

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