这是您正在寻找、测试的内容，我在自己的网站上使用它：

function the_slug_exists($post_name) {
    global $wpdb;
    if($wpdb->get_row("SELECT post_name FROM wp_posts WHERE post_name = \'" . $post_name . "\'", \'ARRAY_A\')) {
        return true;
    } else {
        return false;
    }
}

if (the_slug_exists(\'contact\')) {
    // do something
}

你的意思是后鼻涕虫？你可以试着利用wp_unique_post_slug() WP用来生成这些。如果我没记错的话，如果您尝试使用的slug不是唯一的，它将返回并附加数字索引。

$args = array(\'name\' => $slugName, \'post_type\' => $postType); 

$slug_query = new WP_Query($args);
echo "<pre>";
var_dump($slug_query);
exit;

这种更简单的方法怎么样？

$post_exists = get_page_by_path( $slug, OBJECT, $post_type );
if ( ! $post_exists )
    echo \'No post exists with this slug.\';

$your_slug = \'my-pageeeeeee\';
$wpdb = $GLOBALS[\'wpdb\'];



//==================FIRST method======================
    $id = $wpdb->get_var($wpdb->prepare("SELECT ID FROM " . $wpdb->posts . " WHERE post_name = \'%s\' AND ( post_type = \'page\' OR post_type = \'post\') ", $slug) );
    if (!empty($id)) {
        //............
    }





//====================SECOND method======================
    $counts = $wpdb->get_var($wpdb->prepare("SELECT count(post_name) FROM ".$wpdb->posts ." WHERE post_name like \'%s\'", $slug) );
    if ($counts >=1 ) {
        //.............
    }