&reftitle.examples;

## Basic usage

Some simple examples on using the `overload` function:

### 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->x = 56;

    // instantiate stdclass (it is built-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
    $o->a = array($val);
    var_dump($o->a[0]->prop);

    ?>