<?php
class simple {
    function getName($id) 
    {
        if ($id == 10) {
            return "Sterling";
        } else {
            $err = &new simple_error(-10, 
                    "Invalid id given!");
            return $err;
        }
    }
}

class simple_error {
    var $str;
    var $number;

    function simple_error($number, $str) 
    {
        $this->str = $str;
        $this->number = $number;
    }
}

// start sample code
$s = &new simple;
$name = $s->getName(20);
if (is_object($name)) {
    die ("An error occured " . 
         "[{$name->number}]: " . 
         "{$name->str}\n");
}
else {
    print "Name for ID 20 was found\n";
}