: Failure of a single image on the server

: The failure of a single image on the server suddenly found that some images on the webpage were loading problems. When you access these image links separately, file not find is reported, but the images still exist in the corresponding directory on the server. However, external connections cannot be accessed. Is there a saying that the server image is invalid? Why does image link access report 404?

Reply to discussion (solution)

The file suffix is not in the server mime list (that is, the server does not send unknown files)
The file directory is not under the jurisdiction of the web server
Although the file directory is within the jurisdiction of the web server, it is excluded by open_basedir.