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Posts Tagged ‘PHP’
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WordPress: Embed Youtube Feed With a Simple Shortcode

August 13th, 2010rss 35 comments

UPDATE: Looking for more functionality and an easier installation method?

Check out my WordPress plugin: Youtube Feeder

It's based on this code and has a LOT more features

WordPress shortcodes are great. They let you perform complex operations or display dynamic content with just a tiny bit of text in any page or post.

I recently needed a way to embed the most recent videos from a Youtube channel (very dynamic information) in a WordPress page, so I decided to write a shortcode for it.

The code is actually pretty simple. Just add the following to your theme's functions.php file:

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function youtube_feed_shortcode($atts)
{
    // Defaults:
    extract(shortcode_atts(array(
            'user' => 'flamadiddle86', // youtube user
            'limit' => 5, // maximum number of videos
            'height' => 385, // video height
            'width' => 480 // video width
        ), $atts));
    $data = @json_decode(file_get_contents('http://gdata.youtube.com/feeds/api/users/'.$user.'/uploads?alt=json'), TRUE);
    $counter = 0;
    $content = '<div class="youtubefeed">';
    foreach($data['feed']['entry'] as $vid)
    {
        $url = $vid['media$group']['media$content'][0]['url'];
        $title = $vid['title']['$t'];
        $ycontent = $vid['content']['$t'];
        $content.= '<object width="'.$width.'" height="'.$height.'">'.
            '<param name="movie" value="'.$url.'"></param>'.
            '<param name="allowFullScreen" value="true"></param>'.
            '<param name="allowscriptaccess" value="always"></param>'.
            '<embed src="'.$url.'" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="'.$width.'" height="'.$height.'"></embed></object>'.
            '<div class="youtubetitle">'.$title.'</div>'.
            '<div class="youtubecontent">'.$ycontent.'</div>'."\n";
        $counter++;
        if($counter == $limit)
        {
            break;
        }
    }
    $content .= '</div>';
    return $content;
}

add_shortcode('youtubefeed', 'youtube_feed_shortcode');

And it couldn't be easier to use. The videos you see below were embedded simply by putting this code in the post:

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[youtubefeed]

Read more...

Categories: Programming, Web Development Tags: , , , , , , , , , service

PHP: Validate an IP Address

March 13th, 2010faq 2 comments

So you need to check if some string is a valid IP address. You could simply test it against a regular expression:

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function is_valid_ipv4($ip)
{
    return preg_match('/\b(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.'.
        '(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.'.
        '(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.'.
        '(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\b/', $ip) !== 0;
}

Regular Expression obtained here

This will actually work for most situations, but it's lacking in a few ways. Suppose you want to exclude private or reserved IP addresses. Maybe you want to validate IPv6 addresses too; not just IPv4.

Enter PHP's Data Filtering Extension. It just works, and you don't have to worry about maintaining (or properly applying) complex regular expressions.

Read more...

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Categories: Programming Tags: , , , , , , , , ,
conditions

PHP and FFMPEG - Performing intelligent video conversion

October 5th, 2009 9 comments

Whenever I have limited experience with something or just need to do some research, I go straight to StackOverflow.com - a computer programming question and answer site.  Out of the 24 questions I've asked on the site, only one has gone unanswered to date, and I've gleaned countless other answers from questions others have already asked.  In case you haven't already guessed, I really like the site.

Not long ago, I needed to convert uploaded video files for a project in PHP.  FFMPEG was a clear and obvious choice for the job, but I had never used it before, so I turned to my favorite resource.  Sure enough, I got enough information in the answers to build a fully working solution.  I posted that solution as an answer to my own question in case anyone else could use it.

Unfortunately, StackOverflow seems to be having trouble displaying my answer, so I've reposted it here for anyone who needs it.

Read more...

Categories: Programming Tags: , , , , ,
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