用于分类法的WordPress自定义端点

Question

我正在尝试创建一个自定义端点以获取分类法类别（ait-item），我也获得了所有数据，除了图像我找不到标题图像而且我不知道如何找到它或者是否有简单的功能可以做到这一点？

add_action( 'rest_api_init', function () {
register_rest_route( 'inovola/v1', '/categories', array(
 'methods' => 'GET',
 'callback' => 'emad_rest_test'
 ) );
} );

function emad_rest_test() {

$taxonomies = array( 
'ait-items'
);
$args = array(
'orderby'           => 'name', 
'order'             => 'ASC',
'hide_empty'        => false, 
'exclude'           => array(), 
'exclude_tree'      => array(), 
'include'           => array(),
'number'            => '', 
'fields'            => 'all', 
'slug'              => '',
'parent'            => '',
'hierarchical'      => true, 
'child_of'          => 0,
'childless'         => false,
'get'               => '', 
'name__like'        => '',
'description__like' => '',
'pad_counts'        => false, 
'offset'            => '', 
'search'            => '', 
'cache_domain'      => 'core'
 );

  $siteurl = home_url('/');


    $i = 0 ;
    $taxonomy = 'ait-items';
    $terms = get_terms($taxonomies, $args);
    $count = count($terms);
    if ( $count > 0 ){
 foreach ( $terms as $term ) {
 $id = $term->term_id;
 $image_url = get_category_link($term->term_id);
 $emadbishay[$i]['termlinks']=get_category_link($term->term_id);
 $emadbishay[$i]['term_id']= $term->term_id;
 $emadbishay[$i]['slug']= $term->slug;
 $emadbishay[$i]['name']= $term->name;
 $emadbishay[$i]['image'] = $image_url ;
 $emadbishay[$i]['taxonomy']= $term->taxonomy;
 $emadbishay[$i]['term_taxonomy_id']=$term->term_taxonomy_id ;
       $emadbishay[$i]['filter']= $term->filter ;
      $i++;
      }

   }

     return $emadbishay ;

   }

谢谢