WordPress comment hacks

gistfile1.php

//start by checking for a couple of key pieces of info
$current_user = wp_get_current_user();
$private_comments = get_post_meta($post->ID, 'private_comments', true);
$meta_lock = get_post_meta($post->ID, 'meta_lock', true);
$time_lock = get_post_meta($post->ID, 'time_lock', true);

//if the post has the custom field 'meta_lock'
if ($meta_lock) {
  //check the current user for that meta field
  $user_meta_key =  get_user_meta($current_user->ID, $meta_lock, true);
    if ($current_user->ID AND $user_meta_key) {
      //display the comment form
      comment_form();
      //give an error message (add some flare!)
    } else { echo 'Special users only!'; }

//if the post has the custom field 'time_lock'	
} elseif ($time_lock) {
  //get the age of the user and prepare the age limits
  $user_age=date("Y-m-d", strtotime($current_user->user_registered));
  $age_limit = strtotime($time_lock);
  $account_age = strtotime($user_age);
  
  //if the current user is OLDER than the set limit
  if ($current_user->ID AND $account_age <= $age_limit) {
    //display the comment form
    comment_form();
  //give an error message (add some flare!)
  } else { echo 'Users older than '.$user_age.' only!'; }

//if the post has the field 'private_comments'	
} elseif ($private_comments) {
  //check if the user has an ID (aka is signed in)
  if ( $current_user->ID ) {
    //display the comment form
    comment_form();
  //give an error message (add some flare!)
  } else { echo 'Users only!'; }

//no special conditions met, just display the comment form  
} else { comment_form(); }