Talk about fastcgi and php-fpm in php!

fastcgi is platform-independent and language-independent. As long as any language is implemented according to its interface, it can realize the fastcgi capability of its own language and communicate with the web server.

PHP-CGI is the FastCGI manager implemented by PHP.

FastCGI is a protocol that serves as a bridge between applications and WEB servers. Nginx cannot communicate directly with PHP-FPM, but passes the request to PHP-FPM for processing through FastCGI.

 location ~ \.php$ {
    try_files $uri /index.php =404;
    fastcgi_pass 127.0.0.1:9000;
    fastcgi_index index.php;
    fastcgi_buffers 16 16k;
    fastcgi_buffer_size 32k;
    fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
    include fastcgi_params;
}

Here fastcgi_pass forwards all php requests to php-fpm for processing. You can see through the netstat command that the process running on the port 127.0.0.1:9000 is php-fpm.

##Open php- fpm method:

# nohup /usr/sbin/php-fpm -R >/dev/null 2>&1 &

View the php running directory command:

which php
/usr/bin/php

Restart php-fpm:

/etc/init.d/php-fpm restart

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