[SOLVED] URL verification issues

[NeTech-UK]

alas another problem I am creating a shorturl redirect script for a client which can be seen here;

 

http://portfolio.netech-uk.com/shorturl/

 

A specific request was that the link entered is validated on the fly, either with or without the "http://" and the "www." the problem i am having is that it will verify any of the following URL's.

 

http://www.ziddu.com
http://ziddu.com
www.ziddu.com
ziddu.com
http://www.ziddu
www.ziddu

 

obviously i dont want it to validate the last two url's in that list code is as follows...

 

<?php

include 'config.php';

//===========================================
// CHECK TO SEE IF THE LINK SUPPLIED IS VALID
//===========================================

$testurl = htmlspecialchars($_POST['url']);
if (!preg_match("/^(https?:\/\/+[\w\-]+\.[\w\-]+)/i",$testurl))
{
if (!preg_match("/^([\w\-]+\.[\w\-]+)/i",$testurl))
{
	$linkvalid = 0;
	$error = "Link Is Invalid"; 
}
else
{
	$linkvalid = 1;
	$error = "None";
}
   
}
else
{
$linkvalid = 1;
$error = "None";
}

//==============================================
// CHECK TO SEE IF THE CHOSEN TAG ALREADY EXISTS
//==============================================
$getdata = mysql_query("SELECT * FROM shorturl_redirects WHERE tag = '$tag'");
while ($data = mysql_fetch_array($getdata))
{
$linkvalidated = 0;
$tagexists = 1;
$error = "Tag Already Exists!";
}

//=======================================
// CHECK TO SEE IF THE CHOSEN URL EXISTS
//=======================================
$getdata = mysql_query("SELECT * FROM shorturl_redirects WHERE url LIKE '%$url%'");
while ($data = mysql_fetch_array($getdata))
{
$linkvalidated = 0;
$linkexists = 1;
$error = "URL Already Exists!";
}



//================================
// IF NO ERRORS GIVE THE ALL CLEAR
//================================
if (($linkexists != 1) && ($tagexists != 1) && ($linkvalid == 1))
{
$linkvalidated = 1;
$error = "None";
}

 

Any Help Would Be Appreciated

 

 

[NeTech-UK]

Thanks to several jars of coffee and a severe lack of sleep I have found the problem with this script. For those of you that are interested the new code is as follows...

 

<?php

include 'config.php';

//===========================================
// CHECK TO SEE IF THE LINK SUPPLIED IS VALID
//===========================================

$testurl = htmlspecialchars($_POST['url']);

   if (!preg_match("/^(www\.)+([\w\-]+\.[\w\-]+)/i",$testurl))
   {
   if (!preg_match("/^([\w\-]+\.[\w\-]+)/i",$testurl))
   	   {
      		$linkvalid = 0;
        $error = "The Link You Have Supplied Is Invalid"; 
   }
   else if (preg_match("/^(www\.)+([\w\-]+)/i",$testurl))
   {
	$linkvalid = 0;
        $error = "The Link You Have Supplied Is Invalid"; 
   }
   else
   {
      $linkvalid = 1;
      $error = "None";
   }
   }	
   else
   {
      $linkvalid = 1;
      $error = "None";
   }
   

//==============================================
// CHECK TO SEE IF THE CHOSEN TAG ALREADY EXISTS
//==============================================
$getdata = mysql_query("SELECT * FROM shorturl_redirects WHERE tag = '$tag'");
while ($data = mysql_fetch_array($getdata))
{
   $linkvalidated = 0;
   $tagexists = 1;
   $error = "This Tag Already Exists In The Database!";
}

//=======================================
// CHECK TO SEE IF THE CHOSEN URL EXISTS
//=======================================
$getdata = mysql_query("SELECT * FROM shorturl_redirects WHERE url LIKE '%$url%'");
while ($data = mysql_fetch_array($getdata))
{
   $linkvalidated = 0;
   $linkexists = 1;
   $error = "This URL Already Exists In The Database!";
}



//================================
// IF NO ERRORS GIVE THE ALL CLEAR
//================================
if (($linkexists != 1) && ($tagexists != 1) && ($linkvalid == 1))
{
   $linkvalidated = 1;
   $error = "None";
}