hello how i can Extracting the domain from link like that http://www.phpbuilder.com/board/ and http://sub.phpbuilder.com/board/ i try with strstr PHP: if ( strstr($site, "www") ){ $ilk = strpos($site, "."); $orta = substr($site, $ilk+1); $ilkson = strpos($orta, "/"); $orta = substr($site, $ilk+1, $ilkson+1); $uzunluk = strlen($orta); $son = substr($orta, $uzunluk-1); if ($son == "/"){ $ss = substr($orta, 0, $uzunluk-1); } else { $ss = $orta; } But not work Correctly Especially with the short domain any idea ?