無法在wordpress中顯示選擇框作爲ajax響應

Question

我有兩個下拉框，一個帶有自定義分類法，另一個帶有自定義帖子，位於當前所選分類法下。爲此我寫了一個on-change函數。我有一些問題，顯示出把 它的顯示輸出這樣

8Associate<select class="form-control" name="upload_designation" id="upload_designation" > 

<option value="">Select Designation</option><option value=""></option></select> 

，而不是

<select class="form-control" name="upload_designation" id="upload_designation" > 

<option value="">Select Designation</option> 
<option value="8">Associate</option></select> 

我在這裏 張貼我的變化功能好心幫我找出這個問題

function change_desgination() { 
$post_val=explode("_",$_POST['id']); 
$id=$post_val[0]; 
$taxonomy_name=$post_val[1]; 


$out='<select class="form-control" name="upload_designation" id="upload_designation" > 
<option value="">Select Designation</option>'; 

    $args = array(
    'post_type' => 'designation', 
    'post_status' => 'publish', 
    'posts_per_page' => -1, 
    'tax_query' => array(
     array(
      'taxonomy' => 'domain', 
      'field' => 'slug', 
      'terms' => $taxonomy_name 
     ) 
    ) 
); 
$the_query = new WP_Query($args); 

while ($the_query->have_posts()) : $the_query->the_post(); 
$theid=the_ID(); 
$thetitle=the_title(); 

    $out.='<option value="'.$theid.'">'.$thetitle.'</option>'; 

endwhile; 
    $out.='</select>'; 
    die($out); 
} 

可能是問題與報價。任何人都請幫我找到問題。提前致謝。

Answer 1

的問題是與

$theid=the_ID(); 
$thetitle=the_title(); 

更換您的數據

the_ID() and the_title() will ec ho的值爲 ，其中get_the_ID();和get_the_title();將以字符串形式返回值。 所以我用

$theid=get_the_ID(); 
$thetitle=get_the_title(); 

參考鏈接

https://wordpress.stackexchange.com/questions/48523/get-title-of-post-without-using-the-title

而且

https://developer.wordpress.org/reference/functions/get_the_id/

Answer 2

檢查你的代碼，我建議你使用foreach循環，而不是同時如下

<?php 

$out='<select class="form-control" name="upload_designation" id="upload_designation" > 
<option value="">Select Designation</option>'; 

$array = array('one','two','three','four'); 

foreach ($array as $key => $value) { 
    $out.='<option value="'.$key.'">'.$value.'</option>'; 
} 
    $out.='</select>'; 
    die($out); 
?> 

用代碼顯示陣列