Ask the rewrite or other mapping methods of segment's img src?

as shown in the figure, I would like to ask how the src of the segment image is handled, whether it is encrypted by src or nginx rewrite, or by other mapping methods. I would like to learn. I would like to know a lot, to be more detailed, such as how the process is done.
Thank you

Nginx html5 php

Nov.22,2021

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Encrypted files the actual url, manages the outer chain of directory files
there is no such tool to manage the outer chain of files in the directory, not the actual url but the generated encrypted url, that is, url visitors can not see the actual address. can be a network disk tool. Filerun, is currently in use but batch acqui...

Nginx html5 php

Sep.17,2021

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b3ccff-408ce.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b3ccff-408ce.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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