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Install PHP 7.1 on Debian 10

This version of PHP is actively supported.

Good news! PHP 7.1 is being actively supported through 20 Sep 2024. After that point, it's advisable to upgrade to the latest version, since the PHP team will only offer security-related support until 20 Sep 2024, at which point PHP 7.1 will be considered "end-of-life".

Installing PHP 7.1 on Debian 10

Prerequisites

Debian 10 (Buster) installed and updated
Root or sudo access to the system
Terminal access

Installation

Add the Sury PHP repository:

sudo apt update
sudo apt install apt-transport-https lsb-release ca-certificates wget
sudo wget -O /etc/apt/trusted.gpg.d/php.gpg https://packages.sury.org/php/apt.gpg
echo "deb https://packages.sury.org/php/ $(lsb_release -sc) main" | sudo tee /etc/apt/sources.list.d/php.list

Update package list:
```
sudo apt update
```

Install PHP 7.1 and common extensions:

sudo apt 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

Verification

Check PHP version:
```
php -v
```
This should display PHP 7.1.x information.
Verify installed modules:
```
php -m
```
This will list all installed PHP modules.
Check PHP-FPM status:
```
sudo systemctl status php7.1-fpm
```
This should show that PHP-FPM is active and running.