我正在开发一个使用WP CMS的网站，我想在这里实现帖子标题作为下拉列表，以及当用户选择下拉标题时，在重新加载中显示以下内容。我在这里。如果我想按id检索内容，我该怎么办？

function select_options(){ ?>

     <form action="" method="POST">
     <select name="count" id="selectId" >
     <?php  

     $posts = new WP_Query(array(\'posts_per_page\' => 3, \'post_type\' => \'post\')); 
     while($posts->have_posts()) : $posts->the_post(); ?>
        <option id="selection" value="<?php echo get_the_ID(); ?>"><?php echo get_the_title(); ?></option>
     <?php endwhile;
     die()
     ?>
     </select>
    </form>
    <?php 
}

add_action(\'wp_ajax_select_option\', \'select_options\');
add_action(\'wp_ajax_nopriv_select_option\', \'select_options\');

jQuery(document).ready(function(){
            jQuery.ajax({
                //var count = $(\'#selection\').val();
                type: \'POST\',
                url: \'wp-admin/admin-ajax.php\',
                data:{
                    action: \'select_option\'
                    //count: count;
                },
                dataType: \'html\',
                success: function(data){
                    jQuery(\'.content\').html(data)
                },
                error: function(){
                    alert(fail)
                }
            })

    });