页面刷新，但不会；t更新新内容

下面的代码运行良好——点击提交按钮时会更新数据库中的排名，但随后会刷新页面并加载旧内容，而不是用新内容更新。如何在刷新时加载新内容。

     <?php
        function update_ranks($newimgurl,$newrank){
        switch ($newrank)
        {
        case "1":
              $rank="1st";
              break;
        case "2":
              $rank="2nd";
              break;
        case "3":
              $rank="3rd";
              break;
        }

                $field_key = "field_582fdg46";  
                $value=array();
                $count=0;
                global $totalimgs;
                global $allimgurl;          
                        global $allimgranks;               
                while ($count < $totalimgs){
                if ($allimgurl[$count]==$newimgurl){
                $value[] = array("imglink" => $newimgurl,"rank" => $rank );
                }
                else{
                $value[] = array("imglink" => $allimgurl[$count],"rank" => $allimgranks[$count] );      
                }
                $count=$count+1;        
                update_field( $field_key, $value, $post->ID);       
                }
                unset($newrank,$newimgurl,$currentnewrank,$currentimgurl,$rank,$count); 
                unset($allimgurl,
    ,$allimgranks,$totalimgs,$value);   

    }
?>
<?php
        if(isset($_POST['rank1btn'])){
        $currentnewrank=$_POST['rank1'];
        $currentimgurl=$rank1img;
        update_ranks($currentimgurl,$currentnewrank);
        }
        if(isset($_POST['rank2btn'])){
        $currentnewrank=$_POST['rank2'];
        $currentimgurl=$rank2img;
        update_ranks($currentimgurl,$currentnewrank);
        }
        if(isset($_POST['rank3btn'])){
        $currentnewrank=$_POST['rank3'];
        $currentimgurl=$rank3img;
        update_ranks($currentimgurl,$currentnewrank);
        }

    ?>   
     <form id="myform" name="myform" action="" method="POST" >
        <article class="col-xs-12 col-sm-12 col-md-12 col-lg-12 ">
        <?php   
        global $post;
        $bookid=get_the_title($post->ID);;
        $args = get_posts(array('post_type' => 'bookgallery' ,'post_title' =>$bookid, 'posts_per_page' => -1
        ));
        ?>
        <?php
        foreach ( $args as $post ) :  setup_postdata($post);
        if (!empty($post))
            {  
            $allimg=$allrank=array();
            while( have_rows('imgs') ): the_row();
            $temprank=get_sub_field('rank',$post->ID);  
            $tempimg=get_sub_field('imglink',$post->ID);
            $allimg[]=$tempimg;
            $allrank[]=$temprank;
            if ($temprank=='1st') {
            $rank1img= $tempimg;
            $rank1='1st';
            } 
            if ($temprank=='2nd') {
            $rank2img= $tempimg;
            $rank2='2nd';
            } 
            if ($temprank=='3rd') {
            $rank3img=$tempimg;
            $rank3='3rd'
            } 
            endwhile;
            if (!empty($rank1img)){
            ?>
            <div >
            <img src="<?php echo $rank1img; ?>" alt="" >
            <div >1st
                <select name="rank1">
                    <option value="0"> </option>
                    <option value="1">1st</option>
                    <option value="2">2nd</option>
                    <option value="3">3rd</option>    
                        </select>
            </div>   
            <div ><input type="submit" name="rank1btn" value="update rank" id="rank1btn" ></div>   
            </div>   
            <?php } 
            if (!empty($rank2img)){
            ?>
            <div >2nd
            <img src="<?php echo $rank2img; ?>" alt="" > 
            <div >
                <select name="rank2">
                    <option value="0"> </option>
                    <option value="1">1st</option>
                    <option value="2">2nd</option>
                    <option value="3">3rd</option>
                        </select>
            </div>   
            <div ><input type="submit" name="rank2btn" value="update rank" id="rank2btn" ></div>     
            </div>
             <?php } 
            if (!empty($rank3img)){
            ?>   
             <div>3rd  
            <img src="<?php echo $rank3img; ?>" alt="" >   
            <div>
                <select name="rank3">
                    <option value="0"> </option>
                    <option value="1">1st</option>
                    <option value="2">2nd</option>
                    <option value="3">3rd</option>
                        </select>
            </div>   
            <div><input type="submit" name="rank3btn" value="update rank" id="rank3btn" ></div>     
            </div>
             <?php } 
            }
         endforeach; ?>
        </article> 
        </form>

我把update_ranks放在isset代码下面，表单下面…现在它甚至不更新数据库，而当我把isset代码放在表单下面时，它用来更新数据库，但页面刷新是自动发生的，它没有显示新内容。你必须手动刷新页面才能显示出新内容。如何让它在更新数据库的同时自动加载新内容。