PHP - Parse Youtube Id From Youtube Url

Youtube has an advanced api to deliver xml; but when I try to parse its xml, it is not well-defined. I want to get "average rating" for a given video, but simple xml load disregard this section:
$xml = simplexml_load_file('http://gdata.youtube.com/feeds/mobile/videos/wZ252E282go');
print_r($xml);

How can I put the value of "average rating" into an string to echo?

Has anyone had any success doing this?

I'm not sure if I should try to write this myself or use some kind of framework. I found the Zend Gdata framework (http://framework.zend.com/manual/en/zend.gdata.html) and tried it out but I kept getting error: Warning: include_once() [function.include]: Failed opening '1' for inclusion (include_path='.:/usr/share/pear')

I'm assuming it needs to find PEAR which I don't have installed but no where in the Zend docs does it say that it requires PEAR so I'm a little confused. I've never used any of the Zend frameworks so I have no idea if it needs PEAR or not.

Anyone have any other methods for doing this?

thanks.

The application that I want to build is quite simple. Here is a bit of the background of the work flow:

In my company, we create video for our client profile. After the video is done, we upload the video to our website and to youtube. It is done automatically.

After a period of time, the client can delete the video. Of course, it will delete the video in our system as well as the video in youtube. For now, the video in our system is deleted automatically. However, youtube video is deleted manually.

Our company has grown to have quite a lot of clients. It's hard for us to keep track clients that requested to delete their videos. We want to be able to have an application that will delete youtube video automatically.

I already tried to play around with youtube authentication in http://code.google.com/apis/youtube/2.0/developers_guide_php.html#Authentication but I have no luck with the authentication.

I want the application to be able to delete the video under my youtube account without having me to login to youtube. In my case right now, every time the application wants to delete the video, I have to send the request to youtube and ask for verification (i.e. I have to do application verification every time).

Here is what I have done so far:


ini_set('display_errors', 1);
ini_set('log_errors', 1);
ini_set('error_log', dirname(__FILE__) . '/error_log.txt');
error_reporting(E_ALL);


require_once('db_class.php');
require_once 'Zend/Loader.php';
Zend_Loader::loadClass('Zend_Gdata_YouTube');
Zend_Loader::loadClass('Zend_Gdata_AuthSub');
Zend_Loader::loadClass('Zend_Gdata_App_Exception');

session_start();
setLogging('on');
$_SESSION['developerKey'] = 'AI39si5H3hL9tcKOMl80IqzoC6nb87ka1QLgHxLp9nFi1l44dLa987_Gi0rbofLePQdFEWf1lrSB8KGs4lXIrcF8TR6PhUcO3Q';

function getAuthSubRequestUrl()
{
    $next = 'http://example.com/youtube_delete_video.php';
    $scope = 'http://gdata.youtube.com';
    $secure = false;
    $session = true;
    return Zend_Gdata_AuthSub::getAuthSubTokenUri($next, $scope, $secure, $session);
}

function updateAuthSubToken($singleUseToken)
{
    try {
        $sessionToken = Zend_Gdata_AuthSub::getAuthSubSessionToken($singleUseToken);
    } catch (Zend_Gdata_App_Exception $e) {
        print 'ERROR - Token upgrade for ' . $singleUseToken
            . ' failed : ' . $e->getMessage();
        return;
    }

    $_SESSION['sessionToken'] = $sessionToken;
        
    generateUrlInformation();
    
    header('Location: ' . $_SESSION['homeUrl']);
}

function getAuthSubHttpClient()
{
    try {
        $httpClient = Zend_Gdata_AuthSub::getHttpClient($_SESSION['sessionToken']);
    } catch (Zend_Gdata_App_Exception $e) {
        print 'ERROR - Could not obtain authenticated Http client object. '
            . $e->getMessage();
        return;
    }
    $httpClient->setHeaders('X-GData-Key', 'key='. $_SESSION['developerKey']);
    return $httpClient;
}

function generateUrlInformation()
{
    if (!isset($_SESSION['operationsUrl']) || !isset($_SESSION['homeUrl'])) {
        $_SESSION['operationsUrl'] = 'http://'. $_SERVER['HTTP_HOST']
                                   . $_SERVER['PHP_SELF'];
        $path = explode('/', $_SERVER['PHP_SELF']);
        $path[count($path)-1] = 'index.php';
        $_SESSION['homeUrl'] = 'http://'. $_SERVER['HTTP_HOST']
                             . implode('/', $path);
    }
}

function loggingEnabled()
{
    if ($_SESSION['logging'] == 'on') {
        return true;
    }
}

function setLogging($loggingOption, $maxLogItems = 10)
{
    switch ($loggingOption) {
        case 'on' :
            $_SESSION['logging'] = 'on';
            $_SESSION['log_currentCounter'] = 0;
            $_SESSION['log_maxLogEntries'] = $maxLogItems;
            break;

        case 'off':
            $_SESSION['logging'] = 'off';
            break;
    }
}

function logMessage($message, $messageType)
{
    if (!isset($_SESSION['log_maxLogEntries'])) {
        $_SESSION['log_maxLogEntries'] = 20;
    }

    if (!isset($_SESSION['log_currentCounter'])) {
        $_SESSION['log_currentCounter'] = 0;
    }

    $currentCounter = $_SESSION['log_currentCounter'];
    $currentCounter++;

    if ($currentCounter > $_SESSION['log_maxLogEntries']) {
        $_SESSION['log_currentCounter'] = 0;
    }

    $logLocation = 'log_entry_'. $currentCounter . '_' . $messageType;
    $_SESSION[$logLocation] = $message;
    $_SESSION['log_currentCounter'] = $currentCounter;
}

function printCacheWarning()
{
    return '<p class="note">'
         . 'Please note that the change may not be reflected in the API '
         . 'immediately due to caching.<br/>'
         . 'Please refer to the API documentation for more details.</p>';
}


function editVideoData($videoId)
{
    $httpClient = getAuthSubHttpClient();
    $youTubeService = new Zend_Gdata_YouTube($httpClient);
   $videoEntryToUpdate = $youTubeService->getFullVideoEntry($videoId);

    if (!$videoEntryToUpdate instanceof Zend_Gdata_YouTube_VideoEntry) {
        print 'ERROR - Could not find a video entry with id ' . $videoId
            . '<br />' . printCacheWarning();
        return;
    }

    try {
        $putUrl = $videoEntryToUpdate->getEditLink()->getHref();
    } catch (Zend_Gdata_App_Exception $e) {
        print 'ERROR - Could not obtain video entry\'s edit link: '
            . $e->getMessage() . '<br />';
        return;
    }

    $videoEntryToUpdate->setVideoTitle("My Test Movie - Private 10000012");
    $videoEntryToUpdate->setVideoDescription("My Test Movie - Private 10000012");
    $videoEntryToUpdate->setVideoPrivate();

    try {
        $updatedEntry = $youTubeService->updateEntry($videoEntryToUpdate, $putUrl);
        if (loggingEnabled()) {
            logMessage($httpClient->getLastRequest(), 'request');
            logMessage($httpClient->getLastResponse()->getBody(), 'response');
        }
    } catch (Zend_Gdata_App_HttpException $httpException) {
        print 'ERROR ' . $httpException->getMessage()
            . ' HTTP details<br /><textarea cols="100" rows="20">'
            . $httpException->getRawResponseBody()
            . '</textarea><br />'
            . '<a href="session_details.php">'
            . 'click here to view details of last request</a><br />';
        return;
    } catch (Zend_Gdata_App_Exception $e) {
        print 'ERROR - Could not post video meta-data: ' . $e->getMessage();
        return;
    }
        print 'Entry updated successfully.<br /><a href="#" onclick="'
            . 'ytVideoApp.presentFeed(\'search_owner\', 5, 0, \'none\'); '
            . 'ytVideoApp.refreshSearchResults();" >'
            . '(refresh your video listing)</a><br />'
            . printCacheWarning();
}


if (!isset($_GET['token'])) {

$returnURL = getAuthSubRequestUrl();
echo "<a href=".$returnURL.">Link To Google</a>";

} else {
$singleUseToken = $_GET['token'];
updateAuthSubToken($singleUseToken);

/* editVideoData('mJDRXXaFVGw'); */
}



This is how I call the function: http://example.com/youtube_delete_video.php

So, what I need basically is to know
1. how can I store the authentication after I verify it from youtube?
2. What function to populate after I store the authentication? <- I couldn't figure where this part is in the documentation.

PS: example.com is not a real url. It's just for the sake of writing the post he )

I have this function:
    function bbcode($input){
        $input = strip_tags($input);
        $input = htmlentities($input);
        
        $search = array(
                    '/\[b\](.*?)\[\/b\]/is',
                    '/\[i\](.*?)\[\/i\]/is',
                    '/\[u\](.*?)\[\/u\]/is',
                    '/\[img\](.*?)\[\/img\]/is',
                    '/\[url=http://(.*?)\](.*?)\[\/url\]/is',
                    '/\[color=(.*?)\](.*?)\[\/color\]/is',
                    '/\[yt\](.*?)\[\/yt\]/is',
        );
        
        $replace = array(
                    '<b>$1</b>',
                    '<i>$1</i>',
                    '<u>$1</u>',
                    '<img src="$1" style="border:0">',
                    '<a href="$1">$2</a>',
                    '<font style="color:$1">$2</font>',
                    '<object width="660" height="405">
                    <param name="movie" value="'.str_replace("watch?v=", "v/", $1).'" />
                    <param name="allowFullScreen" value="true" />
                    <param name="allowscriptaccess" value="always" /><embed type="application/x-shockwave-flash" width="660" height="405" src="'.str_replace("watch?v=", "v/", $1).'" allowscriptaccess="always" allowfullscreen="true"></embed>
                    </object>',
        );
        
        return nl2br(preg_replace($search,$replace,$input));
    }
There is an error on code:
<param name="movie" value="'.str_replace("watch?v=", "v/", $1).'" />
and on:
<param name="allowscriptaccess" value="always" /><embed type="application/x-shockwave-flash" width="660" height="405" src="'.str_replace("watch?v=", "v/", $1).'" allowscriptaccess="always" allowfullscreen="true">
How can i use str_replace in this situation ? :S

Code: [Select]
$txt = preg_replace( "#\[yt\]http://www.youtube.com/watch?v=(.+?)\[/yt\]#is", '<embed src="http://www.youtube.com/v/\\1" type="application/x-shockwave-flash" wmode="transparent" width="512" height="313" allowfullscreen="true" />', $txt );

Okay this is my code just for inserting it into HTML, the problem is whenever I try to use:

Code: [Select]
[yt]http://www.youtube.com/watch?v=l1G7TJD6Xu0[/yt]
On my form to enter it does not work?  But if I use

Code: [Select]
$txt = preg_replace( "#\[yt\](.+?)\[/yt\]#is", '<embed src="http://www.youtube.com/v/\\1" type="application/x-shockwave-flash" wmode="transparent" width="512" height="313" allowfullscreen="true" />', $txt );
Code: [Select]
[yt]l1G7TJD6Xu0[/yt]
It works.


But I want to use the full URL of the youtube, so I don't want my users to copy/paste just the "l1G7TJD6Xu0" Code , any help? Thank you