How does php solve the problem of being unable to upload files larger than 8 Mb?

This article mainly introduces how php solves the problem that files cannot be uploaded larger than 8 Mb. For more information, see

This article mainly introduces how php solves the problem that files cannot be uploaded larger than 8 Mb. For more information, see

I developed a file upload sharing website and used the following code to implement the file upload function:

The Code is as follows:

When a File with a slightly larger size is found during actual execution, the File couldn't be moved is displayed.
The file name is displayed in the database, but the size is not displayed.
When a file larger than 8 Mb is uploaded, the page does not respond .,