Install imap extension on PHP 7.x or Higher in CentOS 8

yum update -y 

yum install -y https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm 

yum install -y https://rpms.remirepo.net/enterprise/remi-release-7.rpm 

yum install -y php80-php-imap 

cp /opt/remi/php80/root/usr/lib64/php/modules/imap.so /usr/lib64/php/modules/ /bin/echo 'extension="imap.so"' > /etc/php.d/40-imap.ini 

systemctl restart php-fpm

Installation fails with request timeout in Litespeed server

 LiteSpeed totally ignores the usual Apache setting. You can do it yourself by setting some environment variables for LiteSpeed in the .htaccess file of your document root . See below -

<IfModule Litespeed>

SetEnv noabort 1 

SetEnv noconntimeout 1 

</IfModule>