Solution to the failure of f function in php to write Chinese files

I was working on the file upload function recently, that is, I wanted to change my file name, because I wanted to do unified processing, and found that the Chinese file name processing failed. So I will set it up. This article mainly shares with you the solution to the failure of the f function in PHP to write Chinese files. I hope it can help everyone.

Finally solved it, I will post the code below

This will do the trick. It can be processed normally. Following is my modified name code

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