Setup PHP on NGINX

These steps add PHP 7.1-FPM to the NGINX site from guide 4. On a current Ubuntu LTS, install a supported PHP release and point fastcgi_pass at that version’s socket.

Add the PHP repository tooling.

sudo apt-get install software-properties-common
sudo add-apt-repository ppa:ondrej/php
sudo apt-get update

Install PHP 7.1.
```
sudo apt-get install php7.1
```
PHP 7.1 as used in the original 2020 notes.

Install common modules, including FPM for NGINX.

sudo apt-get install php7.1 php7.1-cli php7.1-common php7.1-json php7.1-opcache php7.1-mysql php7.1-mbstring php7.1-mcrypt php7.1-zip php7.1-fpm

apt installing common php7.1 modules and php7.1-fpm — CLI, MySQL, mbstring, zip, and FPM modules.

Edit the PHP INI used by the CLI (and apply the same change in the FPM INI if you use FPM).
```
sudo vi /etc/php/7.1/cli/php.ini
```
In vi, type /cgi. and press Enter. Set:
```
cgi.fix_pathinfo=0
```
Disable PATH_INFO rewriting for CGI.
Restart PHP-FPM.
```
sudo service php7.1-fpm restart
```

Enable PHP in the NGINX site.

sudo vi /etc/nginx/sites-enabled/default

Uncomment the PHP location and point it at the 7.1 FPM socket:

index index.php index.html index.htm index.nginx-debian.html;

location ~ \.php$ {
    include snippets/fastcgi-php.conf;
    fastcgi_pass unix:/run/php/php7.1-fpm.sock;
}

NGINX default site showing the commented PHP FastCGI location block — Remove the comments on the PHP location block, then match the socket to your PHP version.

Restart NGINX.
```
sudo service nginx restart
```

Start NGINX and PHP-FPM on boot.

sudo systemctl enable nginx.service
sudo systemctl enable php7.1-fpm.service