When Does __destruct Not Execute in PHP?

When __destruct Doesn't Get Called in PHP

PHP's __destruct method is used to perform cleanup tasks before the object is destroyed. However, in certain scenarios, it may not be invoked.

Reasons for __destruct Omission:

• Exit Called in Another Destructor: When exit is called within another object's destructor, the remaining destructors are not executed.
• PHP Version Dependency: Prior to PHP 5.3, exit called within a shutdown function registered with register_shutdown_function prevented __destruct calls.
• Fatal Error: If a fatal error occurs elsewhere in the code, __destruct will not be triggered.
• Exception in Another Destructor: If an exception is thrown in another object's destructor, __destruct may not be invoked.
• Exception Handling in Destructors (PHP 5.3 ): Attempting to handle exceptions within a destructor (introduced in PHP 5.3) can also cause __destruct to be skipped.

Verifying __destruct Invocation:

The following additional points may aid in debugging:

• Check error logs or use a debugger to identify any fatal errors that might be preventing __destruct execution.
• Ensure that there are no conflicts or unexpected termination caused by other destructors invoking exit.
• Review shutdown functions and confirm that they are not interfering with __destruct calls (relevant only for PHP versions prior to 5.3).

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