How PHP catches Fatal error errors

Editor to share with you how PHP catches Fatal error errors, I believe most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

Fatal error generally does not need to be captured, but in a complex program, it is difficult to deal with fatal error if there is an occasional lack of memory.

such as。 When fatal error is fetch in the MySQL class. At this time, it is difficult to locate the real problem.

PHP exception handling can be caught by set_error_handler. But it can only catch errors at the NOTICE/WARNING level, and there is nothing you can do about E_ERROR.

Register_shutdown_function can solve the deficiency of set_error_handler.

By registering the callback function at the end of the program through this function, you can catch errors that are not normally captured. Then the error is judged by error_get_last. It is easy to find problems that are difficult to locate.

Function shutdown_function ()

{

$e = error_get_last ()

Print_r ($e)

}

Register_shutdown_function ('shutdown_function')

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