我尝试使用ajax在wordpress中配置搜索区域，所以我将此代码添加到函数中。php

<?php
// the ajax function
add_action(\'wp_ajax_data_fetch\' , \'data_fetch\');
add_action(\'wp_ajax_nopriv_data_fetch\',\'data_fetch\');
function data_fetch(){

    $the_query = new WP_Query( array( \'posts_per_page\' => 5, \'s\' => esc_attr( $_POST[\'keyword\'] ), \'post_type\' => \'post\' ) );
    if( $the_query->have_posts() ) :
        while( $the_query->have_posts() ): $the_query->the_post(); ?>

            <a href="<?php echo esc_url( post_permalink() ); ?>"><?php the_title();?></a>

        <?php endwhile;
  wp_reset_postdata();  
 else: 
  echo \'<h3>No Results Found</h3>\';
    endif;
    die();
}

// add the ajax fetch js
add_action( \'wp_footer\', \'ajax_fetch\' );
function ajax_fetch() {
?>
<script type="text/javascript">

$("input").keyup(function() {

 var keyword = jQuery(\'#searchInput\').val();
 if(keyword == ""){
  jQuery(\'#datafetch\').html("");
 } else {
  jQuery.ajax({
   url: \'<?php echo admin_url(\'admin-ajax.php\'); ?>\',
   type: \'post\',
   data: { action: \'data_fetch\', keyword: keyword  },
   success: function(data) {
    jQuery(\'#datafetch\').html( data );
   }
  });
  });
 }

</script>
<?php
}
?>

然后在我的模板页面中，我添加了

<div class="container ">

  <div class="d-flex justify-content-center ">

      <div class="searchbar">

 <input id="searchInput" class="search_input" type="text" name=""  placeholder="Search...">

   <a href="#" class="search_icon"><i class="fas fa-search"></i></a>

 </div>

 </div>

</div>
<div id="datafetch">
</div>

但当我填写搜索文本时，什么也没有出现，我是否遗漏了什么？谢谢你的帮助