URLHelper: Class for accessing URLs and the HTTP data

This class give you access to the http header information and provides some help for retrieving and parsing urls.

FUNCTIONS:
function isURLAvailable($url)
function isValidURLFormat($url, $strict=false)
function addHTTPtoURL($url)
function getHTTPStatusCode($url)
function getRealURL ($url, $simple = true, $method = "HEAD")
function getHTTPHeader($url)
function getMD5FromURL($url, $estFilesize=500000)

function _openHTTPConnection($url, $method = "HEAD")