使用PHP制作动态的Twitter Bootstrap轮播

Question

I am trying to make a carousel that uses Twitter Bootstrap default JavaScript and CSS but the images should be fetched from the MySQL database.

The HTML for the carousel that i am trying to make dynamic with php is like this:

<div class="carousel-inner">
   <div class="active item">
                <img src="images/sampleAd.jpg" class="pull-left marginTop">
                <img src="images/sampleAd.jpg" class="pull-left marginTop">
                <img src="images/sampleAd.jpg" class="pull-left marginTop">
                <img src="images/sampleAd.jpg" class="pull-left marginLast">
   </div>
   <a class="carousel-control left" href="#myCarousel" data-slide="prev">&lsaquo;</a>
   <a class="carousel-control right" href="#myCarousel" data-slide="next">&rsaquo;</a>
</div>

The end result for PHP file that i'm expecting is like this

<div class="carousel-inner">
   <?php renderAds(); ?>
</div>

The PHP function that i wrote is like this :

function renderAds(){
    $query = queryAds();
    $query_exe = mysql_query($query);

    if(mysql_num_rows($query_exe) == 0){
        echo '<img src="images/sampleAd.jpg" >';
    }else{

        $numb =1;
        $flag =1;
        while($fetched_data = mysql_fetch_array($query_exe)){

            if($numb == 1){
                if($flag == 1){
                    echo '<div class="active item">';
                }else{
                    echo '<div class="item">';
                }
            }elseif($numb == 4){
                echo '<a href="'.$fetched_data['url'].'"  class="pull-left marginLast" ><img src="'.$fetched_data['image_url'].'"></a>';
                echo '</div>';
                $numb =0;
            }else{
                echo '<a href="'.$fetched_data['url'].'" class="pull-left marginTop" ><img src="'.$fetched_data['image_url'].'"></a>';
            }
            $numb++;
            $flag++;
        }


        echo '<a class="carousel-control left" href="#myCarousel" data-slide="prev">&lsaquo;</a>';
        echo '<a class="carousel-control right" href="#myCarousel" data-slide="next">&rsaquo;</a>';
    }


}

Here, by differing from default carousel of twitter bootstrap, i made each slide with 4 images, i expect that each slide transition contains 4 images instead of as by default the single image for one slide. In HTML it works but when I replace it with my PHP function first slide works but if i press next arrow in carousel whole div collapses.

How can I make it work ?

Note : Here Last image must contain the class marginLast, and the other should have marginTop and pull-left classes.

What I expect to be rendered in html is like this:

<div class="carousel-inner">

            <div class="active item">
                <img src="images/sampleAd.jpg" class="pull-left marginTop">
                <img src="images/sampleAd.jpg" class="pull-left marginTop">
                <img src="images/sampleAd.jpg" class="pull-left marginTop">
                <img src="images/sampleAd.jpg" class="pull-left marginLast">
            </div>

            <div class="item">
                <img src="images/sampleAd.jpg" class="pull-left marginTop">
                <img src="images/sampleAd.jpg" class="pull-left marginTop">
                <img src="images/sampleAd.jpg" class="pull-left marginTop">
                <img src="images/sampleAd.jpg" class="pull-left marginLast">
            </div>

            <div class="item">
                <img src="images/sampleAd.jpg" class="pull-left marginTop">
                <img src="images/sampleAd.jpg" class="pull-left marginTop">
                <img src="images/sampleAd.jpg" class="pull-left marginTop">
                <img src="images/sampleAd.jpg" class="pull-left marginLast">
            </div>

            <a class="carousel-control left" href="#myCarousel" data-slide="prev">&lsaquo;</a>
            <a class="carousel-control right" href="#myCarousel" data-slide="next">&rsaquo;</a>
   </div>

How can i make my PHP function to display result markup like above?

Edit : The Output i get is like this:

<div id="myCarousel" class="carousel slide">
          <!-- Carousel items -->
          <div class="carousel-inner">

                <div class="active item">
                    <a href="xx2" class="pull-left marginTop" ><img src="images/sampleAd.jpg"></a>
                    <a href="xx" class="pull-left marginTop" ><img src="images/sampleAd.jpg"></a>
                    <a href="sample.com"  class="pull-left marginLast" ><img src="images/sampleAd.jpg"></a>
                </div>

                <a class="carousel-control left" href="#myCarousel" data-slide="prev">&lsaquo;</a>
                <a class="carousel-control right" href="#myCarousel" data-slide="next">&rsaquo;</a>             
          </div><!-- end carousel-inner -->

  </div><!-- myCarousel -->

According to markup this should work but it doesn't, the arrow by default if there is no more slide than one should be disabled but it is clickable.

Answer 1

I think i came out with answer for my own question, even though all the above answers gave me many ideas. Thank you all

function renderAds(){
    $query = queryAds();
    $query_exe = mysql_query($query);
    if(mysql_num_rows($query_exe) == 0){
        echo '<img src="images/sampleAd.jpg" >';
    }else{
        $numb =1;
        $flag =1;
        echo '<div class="carousel-inner">';
        while($fetched_data = mysql_fetch_array($query_exe)){
            if($numb == 1){
                if($flag == 1){
                    echo '<div class="active item">';
                }else{
                    echo '<div class="item">';
                }
                echo '<a target="_blank" href="http://'.$fetched_data['url'].'" class="pull-left marginTop" ><img src="'.$fetched_data['image_url'].'"></a>';
            }elseif($numb == 4){
                echo '<a target="_blank" href="http://'.$fetched_data['url'].'"  class="pull-left marginLast" ><img src="'.$fetched_data['image_url'].'"></a>';
                $numb = 0;
                echo '</div>';
            }else{
                echo '<a target="_blank" href="http://'.$fetched_data['url'].'" class="pull-left marginTop" ><img src="'.$fetched_data['image_url'].'"></a>';
            }

            $numb++;
            $flag++;
        }

        if($numb > 1 && $numb < 4 ){
            echo '</div>';
            echo '</div>';
        }elseif($numb == 1){
            echo '</div>';
        }elseif($numb == 4){
            echo '</div>';
            echo '</div>';
        }

        echo '<a class="carousel-control left" href="#myCarousel" data-slide="prev">&lsaquo;</a>';
        echo '<a class="carousel-control right" href="#myCarousel" data-slide="next">&rsaquo;</a>';
    }
}