After explaining how to scrape a photo from a Twitter Photo URL using C# (ASP.Net) I decided to port the script PHP so I could use it on WordPress.

I ended up using cURL and a regular expression to do the trick. The result is a redirect to the actual found photo. Just paste the code into a new PHP file and call it with the short code from the Twitter URL as a query string parameter (like:

    //init curl
    $ch = curl_init(); 
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); 
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

    //construct url
    $url = '' . $_SERVER['QUERY_STRING'];
    curl_setopt($ch, CURLOPT_URL, $url);
    //load data
    $data = curl_exec($ch);       

    //extract PhotoUrl with regex
    preg_match('/data-url="(?<PhotoUrl>[^"]+)"/', $data, $matches);
    header('Location: ' . $matches['PhotoUrl'], true, 302);

Smaller image
By default this script will return the large image. If you want a smaller image, change the regular expression to ‘/data-url=”(?<PhotoUrl>[^”]:large+)”/’ . The script will redirect to a smaller version.

Permanent redirect
You might get an extra performance increase by doing a permanent redirect by changing 302 into 301. This kind of redirect will be cached by the browser.