Technote Details :: Requirements for PHP version
Issue
In order to work with PHP, some requirements must be met for both RSS import and export.
Reason
For PHP, some requirements must be met in order to allow MX RSS Reader - Writer work correctly on XML files, and with different encodings.
Solution
The PHP MX RSS Reader-Writer version requires the EXPAT XML library.
For import (reading), the MBSTRING module isn't required if the imported RSS is encoded using utf-8 or iso-8859-1. For other encodings, please install MBSTRING.
If you have the MBSTRING module installed, set allow_url_fopen on On in the php.ini file.
For export (writing), the MBSTRING module isn't required.