Run multiple PHP version in Debian 11

sachin

Prerequisites

apt update
apt-get -y install wget gnupg2 ca-certificates lsb-release apt-transport-https
sh -c 'echo "deb https://packages.sury.org/php/ $(lsb_release -sc) main" > /etc/apt/sources.list.d/php.list'
wget -qO - https://packages.sury.org/php/apt.gpg | sudo apt-key add -
apt update

apt install nginx
systemctl start nginx
systemctl status nginx
systemctl enable nginx

Installing PHP 5.6 and PHP 8.2

apt install php8.2-fpm
apt install php5.6-fpm

systemctl status php8.2-fpm
systemctl status php5.6-fpm

ls /var/run/php/php8.2-fpm.sock
ls /var/run/php/php5.6-fpm.sock

mkdir /var/www/php82
mkdir /var/www/php56

Configuring nginx nano /etc/nginx/sites-available/subdomain.mywebsite.com.conf

server {
        listen 80;
        listen [::]:80;

        root /var/www/php82;
        index index.html index.htm index.nginx-debian.html;

        server_name subdomain.mywebsite.com;

        location / {
                try_files $uri $uri/ =404;
        }
}

save the file and create a soft link in sites-available directory

ln -s /etc/nginx/sites-available/subdomain.mywebsite.com.conf /etc/nginx/sites-enabled/
systemctl reload nginx

sachin

Installing SSL by Letsencrypt

apt install certbot python3-certbot-nginx
certbot --nginx
cd /etc/nginx/sites-available/

Configure port based PHP version. Edit nano subdomain.mywebsite.com.conf

server {
    root /var/www/php82;
    index index.html index.htm index.nginx-debian.html;

    server_name subdomain.mywebsite.com;

    location / {
            try_files $uri $uri/ =404;
    }

    location ~ \.php$ {
        try_files $uri =404;
        fastcgi_split_path_info ^(.+\.php)(/.+)$;
        fastcgi_pass unix:/var/run/php/php8.2-fpm.sock;
        fastcgi_index index.php;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        include fastcgi_params;
    }

    listen [::]:443 ssl ipv6only=on; # managed by Certbot
    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/subdomain.mywebsite.com/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/subdomain.mywebsite.com/privkey.pem; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
}

server {
    root /var/www/php56;
    index index.html index.htm index.nginx-debian.html;

    server_name subdomain.mywebsite.com;

    location / {
            try_files $uri $uri/ =404;
    }

    location ~ \.php$ {
        try_files $uri =404;
        fastcgi_split_path_info ^(.+\.php)(/.+)$;
        fastcgi_pass unix:/var/run/php/php5.6-fpm.sock;
        fastcgi_index index.php;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        include fastcgi_params;
    }

    listen [::]:4443 ssl ipv6only=on; # managed by Certbot
    listen 4443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/subdomain.mywebsite.com/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/subdomain.mywebsite.com/privkey.pem; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
}

server {
    if ($host = subdomain.mywebsite.com) {
        return 301 https://$host$request_uri;
    } # managed by Certbot

    listen 80;
    listen [::]:80;

    server_name subdomain.mywebsite.com;
    return 404; # managed by Certbot
}

Reload Nginx Server

systemctl reload nginx