Since PHP 5 no longer passes around the actual contents of an object between functions (only a reference), how do you copy an object?

Answer: You 'clone" it using the __clone() built-in class method

<?php
    class anotherclass {

        var $id;

    }

    /* Start an instance */
    $a = new anotherclass();
    $a->id = 10;

    /* Clone the active instance, making a copy of the entire object */
    $b = $a->__clone();
    $b->id = 20;

?>