How to install PHP 7.1 on Debian 9

In this article, we will discuss the installation of PHP 7.1 on the Debian 9 to meet your needs.

PHP 7.1 is not available via the default Debian repositories, so we will add the “” repository, update the system and install the PHP 7.1 packages.

sudo wget -O /etc/apt/trusted.gpg.d/php.gpg
sudo sh -c 'echo "deb $(lsb_release -sc) main" > /etc/apt/sources.list.d/php.list'
sudo apt update

To install PHP 7.1 and necessary modules:

sudo apt install php7.1-common php7.1-readline php7.1-fpm php7.1-cli php7.1-gd php7.1-mysql php7.1-mcrypt php7.1-curl php7.1-mbstring php7.1-opcache php7.1-json php7.1-zip php7.1-xml 

Change default PHP settings:

sudo sed -i "s/memory_limit = .*/memory_limit = 256M/" /etc/php/7.1/fpm/php.ini
sudo sed -i "s/upload_max_filesize = .*/upload_max_filesize = 128M/" /etc/php/7.1/fpm/php.ini
sudo sed -i "s/zlib.output_compression = .*/zlib.output_compression = on/" /etc/php/7.1/fpm/php.ini
sudo sed -i "s/max_execution_time = .*/max_execution_time = 18000/" /etc/php/7.1/fpm/php.ini

PHP-fpm process manager has three choices: Static, Dynamic and Ondemand. The default setting for the process manager is “dynamic”, we will change it to “ondemand”.
Rename the default FPM  pool configuration file and create a new one:

sudo mv /etc/php/7.1/fpm/pool.d/www.conf /etc/php/7.1/fpm/pool.d/
sudo nano /etc/php/7.1/fpm/pool.d/www.conf

user = www-data
group = www-data
listen = /run/php/php7.1-fpm.sock
listen.owner = www-data = www-data
listen.mode = 0666
pm = ondemand
pm.max_children = 5
pm.process_idle_timeout = 10s
pm.max_requests = 200
chdir = /

Save and exit.

Restart PHP-fpm:

sudo systemctl restart php7.1-fpm



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