I get the following error on accessing
http://domain.com/webmail
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[Tue Mar xx xx:xx:xx 201x] [error] [client xxx.xxx.xxx.xxx] PHP Fatal error: Cannot redeclare mb_strlen() (previously declared in /var/www/html/roundcube/program/lib/Roundcube/bootstrap.php:374) in /var/www/html/roundcube/vendor/patchwork/utf8/class/Patchwork/Utf8/Bootup/mbstring.php on line 32
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I opened the file(/var/www/html/roundcube/program/lib/Roundcube/bootstrap.php), and this has happened as the PHP module "mbstring" is not installed.
if (!extension_loaded('mbstring'))
{
function mb_strlen($str)
{
This fixed by installing php-mbstring.
#yum install php-mbstring