PHP (78) JavaScript, Ajax (46) windows (39) MySQL (37) C # (35) Linux (22) design patterns (19) Apa

General PHP will use the $ _SERVER ["SERVER_NAME"] obtain the domain name of the site. SERVER_NAME this value is set in the web server, Server only if a domain name is set, there will be no problem. However, if multiple aliases set in Apache and Nginx will have different results. Apache + PHP setting multiple domains, VirtualHost set in Apache, you may like this ServerName a1.example.com ServerAlias a2.example.com ServerAlias a3.example.com separate visits a1.example.com, a2.example.com, a3.example.com, $ _SERVER ["SERVER_NAME"] values are also a1.example.com, a2.example.com, a3.example.com, this seems reasonable, but it should be noted that, assuming there A domain a4.example.com orange mail can also access orange mail to the station, although the value is not set in Server a4.example.com, but the $ _SERVER ["SERVER_NAME"] will be a4.example.com Nginx + PHP same situation , the change to Nginx. Setting multiple domains, in Nginx setting might like server_name a1.example.com a2.example.com a3.example.com separate visits a1.example.com, a2.example.com, a3.example.com, $ _SERVER ["SERVER_NAME"] value will always be the first to set a1.example.com, which prior to use in apache $ _SERVER ["SERVER_NAME"] of the program, when you move Nginx, will cause a lot of problems. Nginx server_name later found the set, you can use regular expressions (Regular expression) to write, I think since Nginx will only respond to the first set value, then I put three domains written in a regular expression, only put one should You can solve it? But not from day one is willing to do so the result is, $ _ SERVER ["SERVER_NAME"] direct the regular expression is displayed. Finally, had to modify variables inside fastcgi_params profile settings will fastcgi_param SERVER_NAME $ server_name; orange mail changed fastcgi_param SERVER_NAME $ host; Reference: showing correct server_name to fcgi (php) http://nginx.org/en/docs/http/server_names .html Nginx regex vhost pattern ends up as PHP server name
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