How to implement upload restriction in PHP

This article mainly introduces "PHP how to achieve upload restrictions", in daily operation, I believe many people in PHP how to achieve upload restrictions on the problem there are doubts, Xiaobian consulted all kinds of information, sorted out simple and easy to use operation methods, I hope to answer "PHP how to achieve upload restrictions" doubts helpful! Next, please follow the small series to learn together!

upload limit

In this script, we added restrictions on file uploads. Users can only upload.gif,.jpeg,.jpg,.png files, the file size must be less than 200 kB:

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