【CodeIgniter】遇到 Nginx 报404错误的解决办法

抛出问题

由于CodeIgniter当初是设计在apache的，而apache对pathinfo是支持比较好的，所以一切都很nice。但是当你把写好的代码放到nginx上，傻眼了，可能出了CodeIgniter的welcom之外，其他都是404错误。

问题原因

原因是默认Nginx不支持pathinfo这种格式，当你浏览器里输入http:\xxx.xxx.com\index.php\pages\home的时候，Nginx会认为你要访问index.php目录下的pages文件夹里的home，所以会报404 not found错误

解决方法

解决方法肯定是要修改服务器的重定向规则，大概有两种思路，一种是改nginx安装目录里的nginx.conf文件，如果你用了虚拟主机的话就去nginx安装目录下的vhosts下找对应的*.conf更改即可。另外一种思路修改CI目录下的.htaccess文件，参见：http://blog.csdn.net/freshlover/article/details/8977111

本文是第一种思路。在修改之前先来看下原始的conf文件：

server{
    listen 80;
    server_name a.b.com;
    access_log /data/wwwlogs/a.b.com.log combined;
    index index.html index.htm index.php;
    include /usr/local/nginx/conf/rewrite/none.conf;
    include /usr/local/nginx/conf/rewrite/static.conf;
    root /data/wwwroot/a.b.com;
    location ~ [^/]\.php(/|$) {
        #fastcgi_pass remote_php_ip:9000;
        fastcgi_pass unix:/dev/shm/php-cgi.sock;
        fastcgi_index index.php;
        include fastcgi.conf;
    }
    location ~ .*\.(gif|jpg|jpeg|png|bmp|swf|flv|mp4|ico)$ {
        expires 30d;
        access_log off;
    }
    location ~ .*\.(js|css)?$ {
        expires 7d;
        access_log off;
    }
    location ~ /\.ht {
        deny all;
    }
}

server {
    listen 443;
    server_name a.b.com;
    ssl on;
    access_log /data/wwwlogs/a.b.com.log combined;
    index index.html index.htm index.php;
    include /usr/local/nginx/conf/rewrite/none.conf;
    include /usr/local/nginx/conf/rewrite/static.conf;
    root /data/wwwroot/a.b.com;
    ssl_certificate   cert/a.b.com/channelcs.pem;
    ssl_certificate_key  cert/a.b.com/channelcs.key;
    ssl_session_timeout 5m;
    ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE:ECDH:AES:HIGH:!NULL:!aNULL:!MD5:!ADH:!RC4;
    ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
    ssl_prefer_server_ciphers on;   
    location ~ [^/]\.php(/|$) {
        #fastcgi_pass remote_php_ip:9000;
        fastcgi_pass unix:/dev/shm/php-cgi.sock;
        fastcgi_read_timeout 1000;
        fastcgi_index index.php;
        include fastcgi.conf;
    }
    location ~ .*\.(gif|jpg|jpeg|png|bmp|swf|flv|mp4|ico)$ {
        expires 30d;
        access_log off;
    }
    location ~ .*\.(js|css)?$ {
        expires 7d;
        access_log off;
    }
    location ~ /\.ht {
        deny all;
    }
}

• 修改php支持pathinfo

  再修改conf之前，找到php的php.ini文件(可能在php安装目录的etc目录也可能在lib文件夹下，看自己的配置)，搜索：cgi.fix_pathinfo
  将注释放开，并置为1：cgi.fix_pathinfo=1

• 修改conf之前有个问题要明确，那就是CI的根目录 是不是web的root目录，如果是的话，如下修改：
  只需要增加如下即可,在location ~ .php$之前增加一段:

//这个意思是，如果你浏览器里要访问的文件不存在时，会自动路由至web根目录下的index.php进行访问。
if (!-e $request_filename) {
     rewrite ^.*$ /index.php last;
}

• 修改完毕之后

server{
    listen 80;
    server_name  a.b.com;
    access_log /data/wwwlogs/a.b.com.log combined;
    index index.html index.htm index.php;
    include /usr/local/nginx/conf/rewrite/none.conf;
    include /usr/local/nginx/conf/rewrite/static.conf;
    root /data/wwwroot/a.b.com;
    if (!-e $request_filename) {
        rewrite ^.*$ /index.php last;
    }

    location ~ [^/]\.php(/|$) {
        #fastcgi_pass remote_php_ip:9000;
        fastcgi_pass unix:/dev/shm/php-cgi.sock;
        fastcgi_index index.php;
        fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
        include fastcgi.conf;
    }
    location ~ .*\.(gif|jpg|jpeg|png|bmp|swf|flv|mp4|ico)$ {
        expires 30d;
        access_log off;
    }
    location ~ .*\.(js|css)?$ {
        expires 7d;
        access_log off;
    }
    location ~ /\.ht {
        deny all;
    }
}