When will __destruct not be called in PHP?

The __destruct will not be called:

• If exit is called in another destructor
• Depending on the PHP Version: if exit is called in a shutdown function registered with register_shutdown_function
• If there is a fatal error somewhere in the code
• If another destructor throws an exception
• If you try to handle an exception in a destructor (PHP >= 5.3.0)

Guess that’s all I can think of right now

& What Pascal MARTIN said. That’s the first step of debugging that.