* @copyright Copyright (c) 2009, Stephen Ingram
*/
class jp_advancedrss
{
/**
* Constructor adds action hook.
*/
function jp_advancedrss()
{
add_action('after_plugin_row', array($this, 'action_after_plugin_row'), 10, 4);
}
/**
* Singleton Getter & Initializer
*
* @return jp_advancedrss
*/
function &get_instance()
{
/**
* @var jp_advancedrss
*/
static $instance;
if ($instance === null)
$instance = new jp_advancedrss();
return $instance;
}
/**
* Activate Action
*
* @return void
*/
function action_activate()
{
}
/**
* After the plugin's row in the plugins table display an error message.
*
* @return void Echoes output
*/
function action_after_plugin_row($plugin_file, $plugin_data, $context)
{
if ($plugin_file == JP_ADVANCEDRSS)
echo '|
Critical '
. $this->get_error()
. 'Please contact your server\'s administrator with this
error message for more information.
|
';
return;
}
/**
* Get friendly error messages telling the user why they can't use the
* plugin.
*
* @return string HTML error message.
*/
function get_error()
{
if (version_compare(PHP_VERSION, '5.2.0') < 0)
return 'This plugin will only work on a server with a PHP version
of at least 5.2.0. Your server is running PHP
version ' . phpversion() . '
';
$errors = '';
/**
* Check for fopen_wrappers
*/
if (!ini_get('allow_url_fopen'))
$errors .= 'Your server\'s PHP enviroment must support
fopen_wrappers to use this plugin.
';
/**
* Check for DOM library
*/
if (!class_exists('DOMDocument'))
$errors .= 'Your server\'s PHP enviroment must have the
DOM extention installed.
';
/**
* Check for XSL library
*/
if (!class_exists('XSLTProcessor'))
$errors .= 'Your server\'s PHP enviroment must have the
XSL extention installed.
';
return $errors;
}
}