How do I install PHPRedis on my server?

The easiest way to install the PHPRedis extension is through the package manager. Ploi uses the Sury PHP repository, which ships a prebuilt Redis extension for each PHP version. Login as the root user and run:

apt install -y php8.5-redis
systemctl restart php8.5-fpm.service

Replace 8.5 with your PHP version. Verify the extension is loaded with:

php -m | grep redis

Installing via PECL (fallback)

If a prebuilt package isn't available for your PHP version, you can compile the extension with PECL instead:

1. Install the build tools:

apt install -y php-pear php8.5-dev

2. Install the Redis extension:

printf "no\n" | pecl install redis

3. Enable it for both FPM and CLI:

echo "extension=redis.so" > /etc/php/8.5/mods-available/redis.ini
ln -sf /etc/php/8.5/mods-available/redis.ini /etc/php/8.5/fpm/conf.d/20-redis.ini
ln -sf /etc/php/8.5/mods-available/redis.ini /etc/php/8.5/cli/conf.d/20-redis.ini

4. Restart PHP-FPM:

systemctl restart php8.5-fpm.service

Again, replace 8.5 with the PHP version you use.