$filename = 'images.txt';
displayTXTList($filename);

function displayTXTList($fileName) {
    if(file_exists($fileName)) {
        $file = fopen($fileName, 'r');
        while (!feof($file)) {
            $url = fgets($file);
            $image = basename($url);
            downloadImages($image);
            downloadImages(str_replace(".jpg", 'l.jpg', $image));
            downloadImages(str_replace(".jpg", 's.jpg', $image));
        }
        fclose($file);
    }
}

function downloadImages($image) {
    echo 'http://i.imgur.com/'.$image;
    echo "<br/>";
    /*
    $ch = curl_init('http:////i.imgur.com//'.$image);
    $fp = fopen('images\\'.$image, 'wb');
    curl_setopt($ch, CURLOPT_FILE, $fp);
    curl_setopt($ch, CURLOPT_HEADER, 0);
    curl_exec($ch);
    curl_close($ch);
    fclose($fp);
    */
    //file_put_contents('images/'.$i, file_get_contents('http://i.imgur.com/'.$i));
}
?>





// Output
http://i.imgur.com/M8zKh.jpg
http://i.imgur.com/M8zKhl.jpg
http://i.imgur.com/M8zKhs.jpg
http://i.imgur.com/SVW1G.jpg
http://i.imgur.com/SVW1Gl.jpg
http://i.imgur.com/SVW1Gs.jpg