Requirements

XML_Parser

To parse the XML files that contain the RSS feeds, XML_RSS requires that the package XML_Parser is installed. However this dependency will be automatically handled by the installer during the installation phase of XML_RSS.

allow_url_fopen configuration value

Since most RSS feeds are located on remote hosts, one has to ensure that the PHP configuration value "allow_url_fopen" is set to "On" before running XML_RSS.

To find out the current value of "allow_url_fopen", one can use the function ini_get(). To set a new value of "allow_url_fopen", ini_set() can be used.

if (ini_get("allow_url_fopen") == 0) {
    echo "Setting allow_url_fopen to On";
    ini_set("allow_url_fopen", 1);
}

/* ... */

Alternatively one can set the value for "allow_url_fopen" directly in the php.ini configuration file of PHP.