comment_reply

Versions
4.6 – 5: comment_reply($nid, $pid = NULL)
6 – 7: comment_reply($node, $pid = NULL)
Code

<?php
function comment_reply($nid, $pid = NULL) {
  // set the breadcrumb trail
  $node = node_load(array('nid' => $nid));
  menu_set_location(array(array('path' => "node/$nid", 'title' => $node->title), array('path' => "comment/reply/$nid")));

  $output = '';

  // are we posting or previewing a reply?
  if ($_POST['op'] == t('Post comment')) {
    $edit = $_POST['edit'];
    $edit = comment_validate_form($edit);
    drupal_set_title(t('Post comment'));
    print theme('page', comment_post($edit));
    return;
  }
  else if ($_POST['op'] == t('Preview comment')) {
    $edit = $_POST['edit'];
    $edit = comment_validate_form($edit);
    drupal_set_title(t('Preview comment'));
    print theme('page', comment_preview($edit));
    return;
  }

  // or are we merely showing the form?
  if (user_access('access comments')) {

    // if this is a reply to another comment, show that comment first
    // else, we'll just show the user the node they're commenting on.
    if ($pid) {
      $comment = db_fetch_object(db_query('SELECT c.*, u.uid, u.name AS registered_name, u.picture, u.data FROM {comments} c INNER JOIN {users} u ON c.uid = u.uid WHERE c.cid = %d AND c.status = 0', $pid));
      if ($comment->nid != $nid) {
        // Attempting to reply to a comment not belonging to the current nid.
        drupal_set_message(t('The comment you are replying to does not exist.'), 'error');
        drupal_goto("node/$nid");
      }
      $comment = drupal_unpack($comment);
      $comment->name = $comment->uid ? $comment->registered_name : $comment->name;
      $output .= theme('comment_view', $comment);
    }
    else if (user_access('access content')) {
      $output .= node_view($node);
      $pid = 0;
    }

    // should we show the reply box?
    if (node_comment_mode($nid) != 2) {
      $output .= theme('box', t('Reply'), t("This discussion is closed: you can't post new comments."));
    }
    else if (user_access('post comments')) {
      $output .= theme('comment_form', array('pid' => $pid, 'nid' => $nid), t('Reply'));
    }
    else {
      $output .= theme('box', t('Reply'), t('You are not authorized to post comments.'));
    }
  }
  else {
    $output .= theme('box', t('Reply'), t('You are not authorized to view comments.'));
  }

  drupal_set_title(t('Add new comment'));
  print theme('page', $output);
}
?>
comment_reply

Code

Search Drupal 4.6
