7.4.1 Problem
7.4.2 Solution
Objects are automatically destroyed when a script terminates.
To force the destruction of an
object, use unset( ):
$car = new car; // buy new car ... unset($car); // car wreck
7.4.3 Discussion
It's not normally necessary to manually clean up objects, but
if you have a large loop, unset( ) can help keep memory usage from
spiraling out of control.
PHP 4 doesn't have destructors, however Zend Engine 2 supports
them with the _ _destruct( ) method.
