Facebook Open Graph Object Dynamic Webpage
===

So I'm making an iPhone app that involve sharing through Facebook open graph protocol.However I'm stuck while creating a dynamic webpage for the object with meta tag. I came across this post, http://stackoverflow.com/questions/8431694/dynamic-generation-of-facebook-open-graph-meta-tags, and tried using the code, but it doesn't work.

This is my food.php object webpage.

    <?php
    
    $params = array();
    if(count($_GET) > 0) {
        $params = $_GET;
    } else {
        $params = $_POST;
    }
    
    // defaults
    if($params['type'] == "") $params['type'] = "food";
    if($params['title'] == "") $params['title'] = "default title";
    if($params['image'] == "") $params['image'] = "blank";
    if($params['description'] == "") $params['description'] = "default description";
    
    ?>
    
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
    
        <head prefix="og: http://ogp.me/ns# fb: http://ogp.me/ns/fb# MY_APP_NAME_SPACE: http://ogp.me/ns/fb/MY_APP_NAME_SPACE#">
    
            <!-- Open Graph meta tags -->
            <meta property="fb:app_id" content="MY_APP_ID" />
            <meta property="og:url" content="http://mysite.com/index.php?type=<?php echo $params['type']; ?>&title=<?php echo $params['title']; ?>&image=<?php echo $params['image']; ?>&description=<?php echo $params['description']; ?>"/>
            <meta property="og:type" content="MY_APP_NAME_SPACE:<?php echo $params['type']; ?>"/>
            <meta property="og:title" content="<?php echo $params['title']; ?>"/>
            <meta property="og:image" content="http://mysite.com/img/<?php echo $params['image']; ?>.jpg"/>
            <meta property="og:description" content="<?php echo $params['description']; ?>"/>
    
        </head>
    </html>

With this code reside in my server, I tried access the page using fb object debugger tool with this url.

    http://mysite.com/food.php?fb:app_id=MY_APP_ID
    &og:type=MY_APP_NAME_SPACE:food
    &og:title=Pizza
    &og:description="Pizza"
    &og:image=http://mysite.com/img/someImage.jpg

*note there is no space in the url

and the debugger throws this error

Error Parsing URL:Error parsing input URL, no data was scraped.

I suppose the problem lies in the url that I entered because the tool cannot parse it?If not what could it be?