Reguler Expression with php

[Idur <bakpia_lumpia@yahoo.com>]

Hi again,
I have function using regular expression in php, to read URL address 
and process it, the sample of URl address is like this :
 
mail1.plasa.com --------------> the result -->mail1.plasa.com
mail.yahoo.com  --------------> the result -->mail.yahoo.com
us.f416.mail.yahoo.com -------> the result -->mail1.yahoo.com
login.mail.eudoramail.com ----> the result -->mail1.mail.eudoramail.com
images.google.com ------------> the result -->google.com
us.i1.yimg.com ---------------> the result -->yimg.com
212.213.255.72 ---------------> the result -->212.213.255.72
mail.telkom.net --------------> the result -->mail.telkom.net
 
May be somthing wrong, when i input the url "mail.telkom.net" or 
"mail1.plasa.com" the result not like i want it, may be you can help me to 
check what's going on. 
 
the function is like this :
 
function url_address($url){
   $pattern1 = "/[0-9]$/"; // to check if the url is IP address
   $pattern2 = "(mail|mail1)"; // to check if the url have string mail 
or mail1 
 if (ereg($pattern2, $url)){
        // take URL address if the url address is mail.yahoo.com or 
mail.hotmail.com or mail1.plasa.com 
  $www_url = ereg 
("([[:alnum:]]+)\.([[:alnum:]]+)\.([[:alnum:]]+)\.([[:alnum:]]+)\.(com|net|org|edu|mil|gov|gob|info|tv|biz|dk|za)", 
$url,$regs); 
  echo "Alamat URL Asli $url<br>";
  echo "array ke 0 $regs[0]<br>"; 
         echo "array ke 1 $regs[1]<br>"; 
         echo "array ke 2 $regs[2]<br>"; 
         echo "array ke 3 $regs[3]<br>"; 
         echo "array ke 4 $regs[0]<br>"; 
         echo "array ke 5 $regs[1]<br>"; 
  $fix_url="$regs[3].$regs[4].$regs[5]";
 } 
 elseif(preg_match($pattern1, $url)){
       // take the URL address if the url address is IP address (ex; 
122.123.123.123)
  echo "Alamat URL Asli $url<br>";
  $fix_url=$url;
 }
 else{
   // take URL address if the url address is  
www.XXXX.com|net|org|edu|mil|gov|gob|info|tv|biz
   $www_url = ereg("^(www)\.([[:alnum:]]+)\.([[:alnum:]]+)", $url, 
$regs);
   if ($www_url):
          echo "Alamat URL Asli $url<br>";
    $fix_url="$regs[2].$regs[3]";// www dibuang dan diambil nama.domain
    else: 
    // take URL address if the url address is  
www.YYYY.XXXX.com|net|org|edu|mil|gov|gob|info|tv|biz
          echo "Alamat URL Asli $url<br>";
    $www_url = 
ereg("([[:alnum:]]+)\.(com|net|org|edu|mil|gov|gob|info|tv|biz|dk|za)", $url, $regs);
    $fix_url="$regs[0]";
    endif;
 }
return $fix_url;
}
 
 
 

Thanks for your help
idur


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