I'm trying to install indefero on a CentOS 5.3 VMware 'box' and I ran into a problem. Quite early in the installation I get an error that I've been able to narrow down to this:

[root@code /var/www/html]# cat x.php
 <?php
     mb_internal_encoding("UTF-8");
 ?>
[root@code /var/www/html]# php x.php
PHP Fatal error:  Call to undefined function mb_internal_encoding() in 
/var/www/html/x.php on line 2

I get the same error when calling this script via http through Apache. Now according to the PHP manual the mb_internal_encoding function should be a builtin in PHP 5.

I have CentOS 5.3 i386 (Linux code 2.6.18-53.1.21.el5 #1 SMP Tue May 20 09:34:18 EDT 2008 i686 i686 i386 GNU/Linux) and I've installed PHP 5.2.9.

[root@code /var/www/html]# php -v
PHP 5.2.9 (cli) (built: Jul  8 2009 06:03:36)
Copyright (c) 1997-2009 The PHP Group
Zend Engine v2.2.0, Copyright (c) 1998-2009 Zend Technologies

I double checked: selinux has been disabled (for now).

How do i fix this?

php mbstring
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