你应该能够meta_query 在a中WP_Comment_Query():

$args = array(
    \'post_id\'    => \'post-id-here\',
    \'meta_query\' => array(
        array(
            \'key\'     => \'fish\',
            \'value\'   => \'shark\',
            \'compare\' => \'LIKE\'
        )
    )
 );

// Query the comments
$comment_query = new WP_Comment_Query( $args );

// Count the number of comments
$count = count ( $comment_query );