Location: PHPKode > projects > My little forum > forum/modules/bad-behavior/bad-behavior/trackback.inc.php
<?php if (!defined('BB2_CORE')) die('I said no cheating!');

// Specialized screening for trackbacks
function bb2_trackback($package)
{
	// Web browsers don't send trackbacks
	if ($package['is_browser']) {
		return 'f0dcb3fd';
	}

	// Proxy servers don't send trackbacks either
	if (array_key_exists('Via', $package['headers_mixed']) || array_key_exists('Max-Forwards', $package['headers_mixed']) || array_key_exists('X-Forwarded-For', $package['headers_mixed']) || array_key_exists('Client-Ip', $package['headers_mixed'])) {
		return 'd60b87c7';
	}

	// Fake WordPress trackbacks
	// Real ones do not contain Accept:, and have a charset defined
	// Real WP trackbacks may contain Accept: depending on the HTTP
	// transport being used by the sending host
	if (strpos($package['headers_mixed']['User-Agent'], "WordPress/") !== FALSE) {
		if (strpos($package['headers_mixed']['Content-Type'], "charset=") === FALSE) {
			return 'e3990b47';
		}
	}
	return false;
}

?>
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