I'm trying to find a way to have a conditional snippet in single.php where //do something happens if the current user has not commented on the current post.

I'm hopeless at coding but I'm guessing I need some of this...


$user_id = get_current_user_id()

The comment part baffles me... would this help? https://wordpress.stackexchange.com/questions/137799/how-to-limit-users-to-one-comment-per-post

  • 1
    I added some comments to the code that you referenced. Maybe that will help. Commented Feb 26, 2018 at 10:22

1 Answer 1


[EDIT] Here is the modified code:

$post_id = get_the_ID();          // ID of the current post.
$user_id = get_current_user_id(); // ID of the current user.
$post_author_id = get_post_field( 'post_author', $post_id );
$is_post_author = ( $user_id && $post_author_id == $user_id );
$can_comment = $is_post_author;

 * If $can_comment is not yet TRUE, then it's because either:
 *   a) The user is not the author of the post; or
 *   b) The user is not registered on the site; or
 *   c) The user is logged-out.
if ( $user_id && ! $can_comment ) {
    $comment_count = get_comments( array(
        'post_id' => $post_id,
        'user_id' => $user_id,
        'count'   => true,
    ) );

    $can_comment = empty( $comment_count );

if ( ! $is_post_author ) {
    if ( $can_comment ) {
        echo 'Post your comment.';
    } else {
        echo 'Sorry, you\'ve commented. Or you can\'t comment..';
  • 1
    I've updated the code snippet. Check it out.
    – Sally CJ
    Commented Feb 26, 2018 at 15:50
  • 1
    Sorry if this sounds stupid, but are you sure? Because that's a bit odd. I've already tested the code and it worked well on my end. But it might be caused by some custom queries by your site's theme or a plugin. Try to add wp_reset_postdata(); before/above the $post_id = get_the_ID(); line and see if that helps.
    – Sally CJ
    Commented Feb 27, 2018 at 8:50
  • 1
    So, post authors can always comment on their own posts, even if they've already commented? If that's so, then I had really misunderstand the whole thing about the "excluding the current user's own posts".
    – Sally CJ
    Commented Feb 28, 2018 at 11:42
  • 1
    I've updated the code snippet. Check it out. (replace the previous one that you added to the single.php file)
    – Sally CJ
    Commented Feb 28, 2018 at 13:34
  • 1
    Try the updated code snippet. Hopefully, this time I got it right! =)
    – Sally CJ
    Commented Mar 1, 2018 at 1:00

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