Home > Operation and Maintenance > Nginx > How to implement if nesting in nginx

How to implement if nesting in nginx

PHPz
Release: 2023-05-13 12:01:15
forward
2516 people have browsed it

nginx 不支持 if 嵌套,也不允许在 if 中使用逻辑判断,会报如下错误:

nginx: [emerg] "if" directive is not allowed

当业务需要多个条件判断时,可以借助中间变量来实现

如:我们的网站在 pc 端有多个子域名, 而移动端只有一个域名,对应关系如下:

  • www.test.com --> m.test.com

  • sub1.test.com --> m.test.com/sub1

  • sub2.test.com --> m.test.com/sub2

  • sub3.test.com --> m.test.com/sub3

要实现的效果:在移动端访问 pc 域名时 301 跳转到对应的移动端域名

nginx 的重写规则如下:

# 是否为移动端
set $mobile 0;
if ($http_user_agent ~* (mobile|nokia|iphone|ipad|android|samsung|htc|blackberry)) {
  set $mobile 1;
}

# 获取子域名
set $prefix 1;
if ($host ~* "sub1.test.com") {
  set $prefix 2;
}
if ($host ~* "sub2.test.com") {
  set $prefix 3;
}
if ($host ~* "sub3.test.com") {
  set $prefix 4;
}
set $sign "${mobile}${prefix}";
if ($sign = 11) {
  rewrite ^(.*) http://m.test.com$1 permanent;
}
if ($sign = 12) {
  rewrite ^(.*) http://m.test.com/sub1$1 permanent;
}
if ($sign = 13) {
  rewrite ^(.*) http://m.test.com/sub2$1 permanent;
}
if ($sign = 14) {
  rewrite ^(.*) http://m.test.com/sub3$1 permanent;
}
Copy after login

The above is the detailed content of How to implement if nesting in nginx. For more information, please follow other related articles on the PHP Chinese website!

Related labels:
source:yisu.com
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template