Install imagick extension in PHP

• Install required packages

yum install php-pear php-devel gcc

• Install ImageMagick

yum install ImageMagick
yum install ImageMagick-devel 

• Install ImageMagick PHP Extension

pecl install imagick
echo "extension=imagick.so" > /etc/php.d/imagick.ini

-- OR

Enable remi repository for centos using below guide.

https://www.ubuntumint.com/install-remi-repo-in-rhel-centos-rocky-almalinux/

Once remi repository enabled, you can directly install it from repository using yum.

yum install php-pecl-imagick

• Restart Apache and check the installation

service httpd restart