URL Validation (PHP)

X_GuardiaN_X · Aug 17, 2009

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 · Aug 17, 2009

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

PHP:

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 · Aug 17, 2009

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 · Aug 29, 2009

if you have PEAR maybe it works like this

PHP:

$URLObject = Net_URL($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 · Sep 4, 2009

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>";
}

URL Validation (PHP)

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