[CentOS] PHP help required

Dear all Salam!!!

i am using php+mysql for jffnms. i installed php myadmin for mysql
administration. after login to
phpmyadmin it says mbstring missing.....

i search the yum has php-mbstring.... but when i install it using yum it
says:

php 4.3.9 update
php-snmp update

My question is if install php-mbstring, will php be effected and shows
abnormal behaviour to jffnms????

Regards,

Umair Shakil
ETD
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