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Editor to share with you how to use _ _ autoload () in php, I believe most people don't know much about it, so share this article for your reference. I hope you can learn a lot after reading this article. Let's learn about it together.

Trigger timing: automatically triggers when a page needs a class and the class does not exist

Function: realize the automatic loading of classes

Parameter: 1 parameter (class name that does not exist)

Return value: none

Code example:

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