NamePros.Com - View Single Post - Check if a URL exists.

Originally Posted by abcde

I don't get it, how to use that code above? sorry, im a newbie with php

First, you need a webhost which supports PHP or to install it on your own PC. But on your own PC you need to also install a webserver and it's a real hassle so it's easier to have a webhost with this.

Then, input this script in to a file called file.php (or whatever_you_want.php) and save and close the file.

Now in SecondVersion's script he created the function called $is_valid_url($url); so what you'll want to do to see if a URL exists: (within the same file that the function is in [or if it's included for that matter])

PHP Code:

   <?php

// Test script. Function created by SecondVersion

function is_valid_url($url)

{

    $url = @parse_url($url);

 
    if (!$url)

    {

        return false;

    }

 
    $url = array_map('trim', $url);

    $url['port'] = (!isset($url['port'])) ? 80 : (int)$url['port'];

 
    $path = (isset($url['path'])) ? $url['path'] : '/';

    $path .= (isset($url['query'])) ? "?$url[query]" : '';

 
    if (isset($url['host']) AND $url['host'] != gethostbyname($url['host']))

    {

        if (PHP_VERSION >= 5)

        {

            $headers = implode('', get_headers("$url[scheme]://$url[host]:$url[port]$path"));

        }

        else

        {

            $fp = fsockopen($url['host'], $url['port'], $errno, $errstr, 30);

 
            if (!$fp)

            {

                return false;

            }

            fputs($fp, "HEAD $path HTTP/1.1\r\nHost: $url[host]\r\n\r\n");

            $headers = fread($fp, 4096);

            fclose($fp);

        }

        return (bool)preg_match('#^HTTP/.*\s+[(200|301|302)]+\s#i', $headers);

    }

    return false;

}

 
if(is_valid_url("http://namepros.com"))

{

    echo("w00t for Namepros.com! It's alive!");

}else{

    echo("Oh no! Where did NamePros go!?! :(");

}

 
?>

-RageD