直接访问对象的密钥如何？

$terms = get_the_terms( $post->ID, \'sitecat\' );
$first_term = $terms[0];

echo $first_term->name;

总结前面的所有答案，这里是我使用的帮助要点。执行所有必要的检查并接受与get_the_terms() 作用

function getTheFirstTerm($post, $taxonomy) {
    $post = get_post( $post );
    if ( ! $post ) {
        return false;
    }

    $terms = get_the_terms( $post->ID, $taxonomy );

    if (!empty($terms)  && !is_wp_error( $terms )) {
        //this line effectively returns the first available term object if there is one.
        return $terms[0];
    }

    return false;
}

if (!empty($terms)) {
   if(!is_wp_error( $terms )) {
       //this line effectively returns the first available term object if there is one.
       return $terms[0];
   } else {
       return $terms; //This returns the WP_Error object
   }       
}

这对我有用。它只带来第一类文本，没有锚定。

$terms = get_the_terms( $post->ID , \'your_custom_taxonomy\' ); 
foreach( $terms as $term ) { 
    print $term->name;
    break;
    unset($term);
}