phpredis extension doesn't work, unable to load 'redis.so'

Question

I installed nginx, php, php-fpm, php-pecl-redis by yum.

All of them work but the last one.

When I run /usr/sbin/php-fpm, I got this:

Answer 1

For people who are upgrading their php from 7.0 to 7.4 like me, and not able to get php-redis working. These are the steps I used after following the answers above.

1) remove Redis

sudo apt purge php-redis

2) Install Igbinary

sudo apt-get install php-igbinary

3) Install php-redis again

sudo apt-get install php-redis

I did the steps above because it seems only php7.0 is recognising the php-redis install but not the currently enabled php7.4

I also recommend removing other versions of PHP if you have should your problem continue unsolved.