Need a URL regex (URL verification)

I need a complete URL regex. In other words, I need a script that verifies whether or not a URL is valid.

Ex. http://www.domain.com is valid
http://www.$#.com is not valid

Any help is appreciated. I googled it but have had no luck so far... the ones I found were incomplete or not working. Thanks!

 

Simply way would be to check whether the site is online or not !

All the invalid urls would not be online,so you can use this code

$url="http://www.google.com";
$url1=@file_get_contents($url);
if(!($url1))
{
echo"Invalid url";
}
{
echo"Valid url";
}

PHP:

 

Don't use file_get_contents(). It's slow and takes a lot of memory. If you want to go this way at all, use get_headers().

 

is there anyway to do this using regex? i need this too validate links aswell

 

Hi,

Theres plenty of different email checking methods on google - Quick search came up with the following explaining email validation (using regular expressions)

www.addedbytes.com/php/email-address-validation

Hope it helps,

Regards,

Steve

 

This simple regexp:

$pat = '~[url]http://www\[/url].[a-z0-9_-]+\.[a-z\.]{2,5}~i';
$url = 'http://www.domain.com';
if(preg_match($pat,$url)) {
  ..........
  ..valid url.....
  }else{
  ... not valid .....
 }

Code (markup):

 

how would i remove the www. from it? as not all urls may contain the www subdomain

 

use
$url = "www.google.com";
$newurl = preg_repace('/www\./'.'//',$url);
echo $newurl;


something like that

 

Try other pattern:
$pat = '~https?://[a-z0-9_-\.]+\.[a-z\.]{2,5}[\s/]?~i'';

 

Use filter_var to validate an URL (not to check if it exists but if it's correctly writen).

http://nl2.php.net/filter_var
http://nl2.php.net/manual/en/filter.constants.php

 

Wow ) I did not know this.
Yes, better use this:

$url = 'http://www.domain.com';
if(filter_var($url,FILTER_VALIDATE_URL)) {
.........
..valid url.....
}else{
... not valid .....
}

 

wow. nice function...

thanks dude

please notice it only works at php 5.2.0 or above