URL Validation (PHP)

[X_GuardiaN_X]

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]

[FONT="myriad pro,helvetica,Arial"]Are you just verifying the URL exists? If so, you can do that by grabbing the headers. Try:

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.[/FONT]

 

[nasaboy007]

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]

if you have PEAR maybe it works like this

$URLObject = Net_URL($URL);
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]

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>";
}