title: Unable to call the built in mb_internal_encoding method?
body: <p>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:</p>
  
  <pre><code>[root@code /var/www/html]# cat x.php
   &lt;?php
       mb_internal_encoding("UTF-8");
   ?&gt;
  [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
  </code></pre>
  
  <p>I get the same error when calling this script via http through Apache.
  Now according to the <a href="http://php.net/manual/en/function.mb-internal-encoding.php" rel="noreferrer">PHP manual the mb_internal_encoding function</a> should be a builtin in PHP 5.</p>
  
  <p>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.</p>
  
  <pre><code>[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
  </code></pre>
  
  <p>I double checked: selinux has been disabled (for now).</p>
  
  <p>How do i fix this?</p>