URL Validation (PHP)

X_GuardiaN_X · 08-17-2009, 05:09 AM

I am developing a website that is heavy on domain names, so a good URL validation function is really important. I have searched a lot but haven't been able to find one that seems to work very well.

Can anybody help me out?

chadsmith · 08-17-2009, 09:52 AM

Are you just verifying the URL exists? If so, you can do that by grabbing the headers. Try:

PHP Code:

  function url_exists($url){

    @$headers=get_headers($url);

    return preg_match('/^HTTP\/\d\.\d\s+(200|301|302)/',$headers[0]);

}

It will return true as long as the URL returns 200 (ok), 301 (permanently redirected), or 302 (temporarily redirected). get_headers is a PHP 5 function.

nasaboy007 · 08-17-2009, 10:44 AM

if you're trying to validate that the text input by a user really is a url string, you could do something like filter_var($url, FILTER_VALIDATE_URL); assuming you hvae php5

OverDark · 08-29-2009, 03:35 PM

if you have PEAR maybe it works like this

PHP Code:

  $URLObject = Net_URL($URL);

????: NamePros.com http://www.namepros.com/programming/603820-url-validation-php.html
if($URL == $URLObject->getURL()){

// action if the url is valid

} else {

// action if url is invalid

}

though i'm not sure if it works in PHP 5

Hanratty · 09-04-2009, 03:32 AM

function isValidURL($url)
{
return preg_match('|^http(s)?://[a-z0-9-]+(.[a-z0-9-]+)*(:[0-9]+)?(/.*)?$|i', $url);
}

if(!isValidURL($fldbanner_url))
{
$errMsg .= "* Please enter valid URL including http://<br>";
}

08-17-2009, 05:09 AM	THREAD STARTER #1 (permalink)
X_GuardiaN_X NamePros Regular Join Date: Jan 2006 Posts: 322	URL Validation (PHP) I am developing a website that is heavy on domain names, so a good URL validation function is really important. I have searched a lot but haven't been able to find one that seems to work very well. Can anybody help me out?

08-17-2009, 09:52 AM	#2 (permalink)
chadsmith NamePros Regular Join Date: Jul 2008 Location: Wichita, KS Posts: 287 Follow @chadsmith	Are you just verifying the URL exists? If so, you can do that by grabbing the headers. Try: PHP Code: `function url_exists($url){ @$headers=get_headers($url); return preg_match('/^HTTP\/\d\.\d\s+(200\|301\|302)/',$headers[0]); }` It will return true as long as the URL returns 200 (ok), 301 (permanently redirected), or 302 (temporarily redirected). get_headers is a PHP 5 function. __________________ Free Services: Alertable.com, DetectMobileBrowser.com, DropCart.com, FreeCronJobs.com, HTMLDTD.com, ImagePNG.com, NoCart.com, phpMyLogin.com, RandomTweeps.com, SearchFriendlyURLs.com For Sale: Keyword Domains / Generics See Also:: Google Voice Add-on for Firefox, Google Wave Add-on for Firefox

08-17-2009, 10:44 AM	#3 (permalink)
nasaboy007 Senior Member Join Date: Jul 2005 Location: NJ Posts: 1,219	if you're trying to validate that the text input by a user really is a url string, you could do something like filter_var($url, FILTER_VALIDATE_URL); assuming you hvae php5 __________________ Hacksar.com - Your source for random computer tips and tricks! MySiteMemberships.com - Keep track of your site registration information! Like my post? Rep is appreciated!

08-29-2009, 03:35 PM	#4 (permalink)
OverDark New Member Join Date: Aug 2009 Posts: 14	if you have PEAR maybe it works like this PHP Code: `$URLObject = Net_URL($URL); ????: NamePros.com http://www.namepros.com/programming/603820-url-validation-php.html if($URL == $URLObject->getURL()){ // action if the url is valid } else { // action if url is invalid }` though i'm not sure if it works in PHP 5

09-04-2009, 03:32 AM	#5 (permalink)
Hanratty New Member Join Date: Sep 2009 Posts: 4	function isValidURL($url) { return preg_match('\|^http(s)?://[a-z0-9-]+(.[a-z0-9-]+)(:[0-9]+)?(/.)?$\|i', $url); } if(!isValidURL($fldbanner_url)) { $errMsg .= "* Please enter valid URL including http://<br>"; } __________________ Listen to Emails Last edited by Hanratty; 09-20-2009 at 08:30 AM.

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