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Name the file with the article/topic as the prefix. Determine which pictures are used in the current article/topic, and then clean up other discarded pictures regularly. If there is enough space, keep them there~~~

The image is uploaded to a temporary folder and moved to the correct folder after the operation is successful. Just clean the temporary folder regularly and write a scheduled task

The steps are as follows,
1 It is recommended to store the uploaded file in the form of /path/to/category/2017/08/09/xxx.ext;
2 Then every time the operation is successful and the correct form is submitted, the corresponding file should be The attachment path and time information are recorded in the attachment table;
3 Next, we can use SQL statements to clean up junk files that are not in the attachment table every day.
No thanks.