I'm not able to install mbstring on Centos 7. I got error when running the command yum install php-mbstring.
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: mirror.cogentco.com
* epel: mirror.symnds.com
* extras: mirror.ash.fastserv.com
* remi-safe: mirrors.mediatemple.net
* updates: mirror.vtti.vt.edu
No package php-mbstring available.
Error: Nothing to do
