domain url validation help

[blacktiger786]

hi friend i need you help i want create a form where when i add a domain its store to database

 

but problem is i want only without http:// or www domains save in database other wise show error please

enter domain without http:// or www

please tell me what php code for this validation thanks in advanced

[vinny42]

The best ways is probably a regular expression. You can remove http:// using str_replace because that can only ever appear at the start of the URL, but the 'www' must only be removed if it appears at the start of the URL and ends with a dot. Otherwise you would break domainnames like 'thisismywwwdomain.com'

 

something like:

$strURl = preg_replace('~^www\.~','',$strURI);

[Irate]

Try parse_url, too. You can just easily get the host name with that.

[QuickOldCar]

A simple example and function.

<?php
function getparsedHost($new_parse_url) {
                        if(!$new_parse_url){
                        return NULL;
                        }
                        if(!preg_match("~://~",$new_parse_url)){
                        $new_parse_url = "http://".$new_parse_url;
                        }
                        $parsedUrl = parse_url(trim(strtolower($new_parse_url)));
                        $parsedUrl = str_replace("www.",'',$parsedUrl);
                        return trim($parsedUrl['host'] ? $parsedUrl['host'] : array_shift(explode('/', $parsedUrl['path'], 2)));
                    }
 
 
//Parsing hosts from array in a loop example:
                  
$url_array = array("google.com","http://google.com","http://images.google.com","google.com/images","ftp://cdn.google.com","HTTP://WWW.GOOGLE.COM","","http://google.co.uk/images","blah.blah.blah.blah");

returns:

 

google.com
google.com
images.google.com
google.com
cdn.google.com
google.com

google.co.uk
blah.blah.blah.blah

 

As can see don't actually check if is a valid top or second level domain, would need to do checking after if needed that.

Also have a function made to get main domains as well, is quite a chunk of code.

Edited October 19, 2013 by QuickOldCar

[QuickOldCar]

No idea why the rest of code didn't post, i surely like the old way here on phpfreaks.

 

 

<?php
function getparsedHost($new_parse_url) {
                        if(!$new_parse_url){
                        return NULL;
                        }
                        if(!preg_match("~://~",$new_parse_url)){
                        $new_parse_url = "http://".$new_parse_url;
                        }
                        $parsedUrl = parse_url(trim(strtolower($new_parse_url)));
                        $parsedUrl = str_replace("www.",'',$parsedUrl);
                        return trim($parsedUrl['host'] ? $parsedUrl['host'] : array_shift(explode('/', $parsedUrl['path'], 2)));
                    }
 
//Parsing hosts from array in a loop example:
                   
$url_array = array("google.com","http://google.com","http://images.google.com","google.com/images","ftp://cdn.google.com","HTTP://WWW.GOOGLE.COM","","http://google.co.uk/images","blah.blah.blah.blah");

[QuickOldCar]

Any reason why I can't post the entire code in here mods?

 

<?php
function getparsedHost($new_parse_url) {
                        if(!$new_parse_url){
                        return NULL;
                        }
                        if(!preg_match("~://~",$new_parse_url)){
                        $new_parse_url = "http://".$new_parse_url;
                        }
                        $parsedUrl = parse_url(trim(strtolower($new_parse_url)));
                        $parsedUrl = str_replace("www.",'',$parsedUrl);
                        return trim($parsedUrl['host'] ? $parsedUrl['host'] : array_shift(explode('/', $parsedUrl['path'], 2)));
                    }
                    
//Parsing hosts from array in a loop example:    
    
$url_array = array("google.com","http://google.com","http://images.google.com","google.com/images","ftp://cdn.google.com","HTTP://WWW.GOOGLE.COM","","http://google.co.uk/images","blah.blah.blah.blah");

foreach($url_array as $urls){
echo getparsedHost($urls)."<br />";
}
?>