/**
* blcUtility::normalize_url()
*
* @param string $url
* @params string $base_url (Optional) The base URL is used to convert a relative URL to a fully-qualified one
* @return string A normalized URL or FALSE if the URL is invalid
*/
function normalize_url($url, $base_url = '')
{
//Sometimes links may contain shortcodes. Parse them.
$url = do_shortcode($url);
$parts = @parse_url($url);
if (!$parts) {
return false;
}
//Invalid URL
if (isset($parts['scheme'])) {
//Only HTTP(S) links are checked. Other protocols are not supported.
if ($parts['scheme'] != 'http' && $parts['scheme'] != 'https') {
return false;
}
}
$url = html_entity_decode($url);
$url = preg_replace(array('/([\\?&]PHPSESSID=\\w+)$/i', '/(#[^\\/]*)$/', '/&/', '/^(javascript:.*)/i', '/([\\?&]sid=\\w+)$/i'), array('', '', '&', '', ''), $url);
$url = trim($url);
if ($url == '') {
return false;
}
// turn relative URLs into absolute URLs
if (empty($base_url)) {
$base_url = get_option('siteurl');
}
$url = blcUtility::relative2absolute($base_url, $url);
return $url;
}
