PHP: Converting __toString when calling json_encode using JsonSerializable interface

JsonSerializable {

/* Methods */

abstract public mixed jsonSerialize ( void )

}

When calling a json_encode on an object:

See:

http://stackoverflow.com/questions/401908/php-tostring-and-json-encode-not-playing-well-together

And:

http://php.net/manual/en/class.jsonserializable.php