xpressengine / xe-core

		if($file_module_config->allow_outlink == 'N')

		{

			// Handles extension to allow outlink

			if($file_module_config->allow_outlink_format)

			{

				$allow_outlink_format_array = array();

				$allow_outlink_format_array = explode(',', $file_module_config->allow_outlink_format);

				if(!is_array($allow_outlink_format_array)) $allow_outlink_format_array[0] = $file_module_config->allow_outlink_format;

				foreach($allow_outlink_format_array as $val)

				{

					$val = trim($val);

					if(preg_match("/\.{$val}$/i", $filename))

					{

						$file_module_config->allow_outlink = 'Y';

						break;

					}

				}

			}

			// Sites that outlink is allowed

			if($file_module_config->allow_outlink != 'Y')

			{

				$referer = parse_url($_SERVER["HTTP_REFERER"]);

				if($referer['host'] != $_SERVER['HTTP_HOST'])

				{

					if($file_module_config->allow_outlink_site)

					{

						$allow_outlink_site_array = array();

						$allow_outlink_site_array = explode("\n", $file_module_config->allow_outlink_site);

						if(!is_array($allow_outlink_site_array)) $allow_outlink_site_array[0] = $file_module_config->allow_outlink_site;

						foreach($allow_outlink_site_array as $val)

						{

							$site = parse_url(trim($val));

							if($site['host'] == $referer['host'])

							{

								$file_module_config->allow_outlink = 'Y';

								break;

							}

						}

					}

				}

				else $file_module_config->allow_outlink = 'Y';

			}