composer install codeigniter/framework

Install composer

https://blog.csdn.net/u011944141/article/details/79569917

Install codeigniter

composer create-project codeigniter/framework  code_igniter  --no-dev --prefer-dist

nginx config

server {
    charset UTF-8;

    listen  	 80;
    #listen 	 443 ssl;
    server_name	 ci.com;
    
    root   /var/www/code_igniter/;
    index  index.php;

    access_log /var/log/code_igniter/access.log;
    error_log /var/log/code_igniter/error.log;
    
    #error_page  404              /404.html;

    # redirect server error pages to the static page /50x.html
    #
    error_page   500 502 503 504  /50x.html;
    location = /50x.html {
        root   /usr/share/nginx/html;
    }

    if ( $fastcgi_script_name ~ \..*\/.*php ) {
        return 403;
    }

    # proxy the PHP scripts to Apache listening on 127.0.0.1:80
    #
    #location ~ \.php$ {
    #    proxy_pass   http://127.0.0.1;
    #}

    # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
    #

    location / {
        try_files $uri $uri/ /index.php?$args;
    }

    location ~ \.php$ {
        try_files $uri = 404;
        fastcgi_pass   unix:/run/php/php7.2-fpm.sock;
        fastcgi_index  index.php;
        fastcgi_intercept_errors on;
        fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
        include        fastcgi_params;
    }

    # deny access to .htaccess files, if Apache's document root
    # concurs with nginx's one
    #
    location ~ /\.ht {
        deny  all;
    }
}

hosts config

    127.0.0.1 ci.com 

Browse access

http://ci.com