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1.When uploading, when the move_uploaded_file function is not used, whether the client file has been transferred to the temporary directory (use the files array to get related information)
2. If it has been uploaded, after how long it will be automatically cleared! !!
3. When the move_uploaded_file function is used up, does the temporary file still exist!
4. Can private and var in the PHP class be used in functions in the class? |
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