一种方法是使用get_posts 功能：

$posts_with_meta = get_posts( array(
    \'posts_per_page\' => 1, // we only want to check if any exists, so don\'t need to get all of them
    \'meta_key\' => \'_sku\',
    \'meta_value\' => \'1\',
    \'fields\' => \'ids\', // we don\'t need it\'s content, etc.
) );

if ( count( $posts_with_meta ) ) {
    // they exist
}