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      Some simple examples on using the overload() function:

      Example #1 Overloading a PHP class

      <?php

      class OO {
         var 
      $a 111;
         var 
      $elem = array('b' => 9'c' => 42);

         
      // Callback method for getting a property
         
      function __get($prop_name, &$prop_value
         {
             if (isset(
      $this->elem[$prop_name])) {
                 
      $prop_value $this->elem[$prop_name];
                 return 
      true;
             } else {
                 return 
      false;
             }
         }

         
      // Callback method for setting a property
         
      function __set($prop_name$prop_value
         {
             
      $this->elem[$prop_name] = $prop_value;
             return 
      true;
         }
      }

      // Here we overload the OO object
      overload('OO');

      $o = new OO;
      echo 
      "\$o->a: $o->a\n"// print: $o->a: 111
      echo "\$o->b: $o->b\n"// print: $o->b: 9
      echo "\$o->c: $o->c\n"// print: $o->c: 42
      echo "\$o->d: $o->d\n"// print: $o->d:

      // add a new item to the $elem array in OO
      $o->56

      // instantiate stdclass (it is built-in in PHP 4)
      // $val is not overloaded!
      $val = new stdclass;
      $val->prop 555;

      // Set "a" to be an array with the $val object in it
      // But __set() will put this in the $elem array
      $o->= array($val);
      var_dump($o->a[0]->prop);

      ?>


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