MB Setting

Sugar version 4.5 requires the system to have mbstring extension installed in your PHP. If you’re compiling PHP yourself, you should enable the mbstring flag.
Within your PHP.ini file, enter the information below:

[mbstring]

mbstring.language = English

mbstring.internal_encoding = UTF-8

mbstring.http_input = auto

mbstring.http_output = pass

mbstring.encoding_translation = On

mbstring.detect_order = auto

mbstring.substitute_character = none

mbstring.func_overload = 0
Note: You may need to run a short script below and see if the mbstring section is displayed.

If mbstrings is not displayed, your php does not have the mbstring extension module or is not mbstring enabled.

Try to “yum info php-mbstring” and check if the mbstring extension is already installed or not.
For more details about mbstrings, go here: http://us3.php.net/mbstring