Redis extension is not loaded for selected php version

Issue

AccelerateWP for users activated, but attempt to enable Object cache failed with the following error:

Redis extension is not loaded for selected php version
Redis PHP extension is required for optimization feature, but not loaded for selected PHP version: alt-phpXX

Environment

• AccelerateWP
• Redis
• ALT-PHP

Solution

1. Ensure that the configuration file for the reported PHP version looks as follows:

   # cat /opt/alt/php81/etc/php.d.all/redis.ini
   ; Enable redis extension module
   extension=msgpack.so
   extension=igbinary.so
   extension=redis.so

2. Then enable the required extensions for the affected user:

   # selectorctl --enable-user-extensions=redis,igbinary,msgpack --version=8.1 --user=jdoe

PHP 8.1 was used as an example