May

17


There are times you may want a URL validation function that accepts (I think) most known types of URL’s. Useful for validating a homepage link, or submission of links from the public.

It allows for port, path and query string validations, the parameter $url string contains the user input URL and the function returns the boolean of true or false.

<?php
/**
* Validate URL
* Allows for port, path and query string validations
* @param    string      $url	   string containing url user input
* @return   boolean     Returns TRUE/FALSE
*/
function validateURL($url)
{
$pattern = '/^(([\w]+:)?\/\/)?(([\d\w]|%[a-fA-f\d]{2,2})+(:([\d\w]|%[a-fA-f\d]{2,2})+)?@)?([\d\w][-\d\w]{0,253}[\d\w]\.)+[\w]{2,4}(:[\d]+)?(\/([-+_~.\d\w]|%[a-fA-f\d]{2,2})*)*(\?(&amp;?([-+_~.\d\w]|%[a-fA-f\d]{2,2})=?)*)?(#([-+_~.\d\w]|%[a-fA-f\d]{2,2})*)?$/';
return preg_match($pattern, $url);
}

$result = validateURL('http://www.google.com');
print $result;
?>

Hope this helps!



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12 Comments so far

  1. m0dk1d on June 5, 2008 9:22 am

    thanks for this simple yet handy script!

  2. Ben Wallis on June 6, 2008 4:19 am

    It doesn’t work for me in PHP 5.2.5

    Warning: preg_match() [function.preg-match]: Unknown modifier ‘[’ in C:\xampp\htdocs\test.php on line 18

  3. admin on June 6, 2008 9:24 am

    Hi, Ben

    I have rewritten the code and tested it, now when you run the code above, you should get either ‘1′ or ‘0′ as results stands for ‘true’ or ‘false’.

    Thanks for pointing it out. Do let me know if there is anymore problem. :)

  4. Not very useful on June 11, 2008 7:47 am

    http://www-google-com
    http://www_google_com

    This regex fails in so many ways

  5. admin on June 14, 2008 6:51 am

    Hi, thanks for point out the problems. It’s fixed now.

  6. desbest on June 23, 2008 2:48 am

    This code does not work. It’s outdated now

  7. desbest on June 23, 2008 3:10 am

    Your code can tell whether something is in a url format such as it beginning with http:// or http://www. but it does not say whether a url actually exists.

    i tried your code with a domain that does not exist and it said “1″ that the url was valid

  8. desbest on June 23, 2008 3:21 am

    After 10 minutes searching for a better url validator than this one, I couldn’t find one. I’ve added you to delicious.

    Even the check if a url exist snippets dont work and require curl.

  9. admin on June 23, 2008 10:47 am

    hi, desbest, mine script is a simple checker that may still need perfection. if there’s anything you can contribute to perfect it, i would appreciate it, i would try to perfect it if i got more time. maybe for now you can take a look at the following link which might be the thing you are looking for:

    http://www.bootstrike.com/PHPAJAXDomainCheck/#bulkdomain

  10. Marian Bucur on August 5, 2008 7:10 am

    Not working… :(

    It allows garbage urls…

  11. Hawyqpyc on September 21, 2008 3:03 pm

    Best Site good looking freexnxx >:-]]

  12. Wawlaywa on September 27, 2008 1:46 pm

    Thanks funny site

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