The usage of Nginx's alias and the difference between it and root

The usage of Nginx’s alias and the difference from root

http://nginx.org/en/docs/http/ngx_http_core_module.html#alias
http://nginx.org/en/docs/http/ngx_http_core_module.html#root

I used to only know how to use root in the location block of Nginx, but I always felt that using it could not satisfy some of my own ideas. Then I finally discovered alias.

Let’s look at the usage of toot first

<code>location <span>/request_path/image/</span> {
    root <span>/local_path/image/</span>;
}</code>

The result of this configuration is that when the client requests /request-path/image/cat.png,
Nginx maps the request to /local_path/image/request-path/image/cat.png

Look at the usage of alias

<code>location /request_path/<span>image</span>/ {
    <span>alias</span> /local_path/<span>image</span>/;
}</code>

At this time, when the client requests /request-path/image/cat.png,
Nginx maps the request to /local_path/image/cat.png
You can know how to use it by comparing root~~ :)

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The above introduces the usage of Nginx's alias and the difference with root, including the relevant content. I hope it will be helpful to friends who are interested in PHP tutorials.