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   1  <?php
   2  /**
   3   * Handles Comment Post to WordPress and prevents duplicate comment posting.
   4   *
   5   * @package WordPress
   6   */
   7  
   8  if ( 'POST' != $_SERVER['REQUEST_METHOD'] ) {
   9      header('Allow: POST');
  10      header('HTTP/1.1 405 Method Not Allowed');
  11      header('Content-Type: text/plain');
  12      exit;
  13  }
  14  
  15  /** Sets up the WordPress Environment. */
  16  require( dirname(__FILE__) . '/wp-load.php' );
  17  
  18  nocache_headers();
  19  
  20  $comment_post_ID = isset($_POST['comment_post_ID']) ? (int) $_POST['comment_post_ID'] : 0;
  21  
  22  $post = get_post($comment_post_ID);
  23  
  24  if ( empty( $post->comment_status ) ) {
  25      /**
  26       * Fires when a comment is attempted on a post that does not exist.
  27       *
  28       * @since unknown
  29       * @param int $comment_post_ID Post ID.
  30       */
  31      do_action( 'comment_id_not_found', $comment_post_ID );
  32      exit;
  33  }
  34  
  35  // get_post_status() will get the parent status for attachments.
  36  $status = get_post_status($post);
  37  
  38  $status_obj = get_post_status_object($status);
  39  
  40  if ( ! comments_open( $comment_post_ID ) ) {
  41      /**
  42       * Fires when a comment is attempted on a post that has comments closed.
  43       *
  44       * @since unknown
  45       * @param int $comment_post_ID Post ID.
  46       */
  47      do_action( 'comment_closed', $comment_post_ID );
  48      wp_die( __('Sorry, comments are closed for this item.') );
  49  } elseif ( 'trash' == $status ) {
  50      /**
  51       * Fires when a comment is attempted on a trashed post.
  52       *
  53       * @since 2.9.0
  54       * @param int $comment_post_ID Post ID.
  55       */
  56      do_action( 'comment_on_trash', $comment_post_ID );
  57      exit;
  58  } elseif ( ! $status_obj->public && ! $status_obj->private ) {
  59      /**
  60       * Fires when a comment is attempted on a post in draft mode.
  61       *
  62       * @since unknown
  63       * @param int $comment_post_ID Post ID.
  64       */
  65      do_action( 'comment_on_draft', $comment_post_ID );
  66      exit;
  67  } elseif ( post_password_required( $comment_post_ID ) ) {
  68      /**
  69       * Fires when a comment is attempted on a password-protected post.
  70       *
  71       * @since unknown
  72       * @param int $comment_post_ID Post ID.
  73       */
  74      do_action( 'comment_on_password_protected', $comment_post_ID );
  75      exit;
  76  } else {
  77      /**
  78       * Fires before a comment is posted.
  79       *
  80       * @since unknown
  81       * @param int $comment_post_ID Post ID.
  82       */
  83      do_action( 'pre_comment_on_post', $comment_post_ID );
  84  }
  85  
  86  $comment_author       = ( isset($_POST['author']) )  ? trim(strip_tags($_POST['author'])) : null;
  87  $comment_author_email = ( isset($_POST['email']) )   ? trim($_POST['email']) : null;
  88  $comment_author_url   = ( isset($_POST['url']) )     ? trim($_POST['url']) : null;
  89  $comment_content      = ( isset($_POST['comment']) ) ? trim($_POST['comment']) : null;
  90  
  91  // If the user is logged in
  92  $user = wp_get_current_user();
  93  if ( $user->exists() ) {
  94      if ( empty( $user->display_name ) )
  95          $user->display_name=$user->user_login;
  96      $comment_author       = wp_slash( $user->display_name );
  97      $comment_author_email = wp_slash( $user->user_email );
  98      $comment_author_url   = wp_slash( $user->user_url );
  99      if ( current_user_can( 'unfiltered_html' ) ) {
 100          if ( ! isset( $_POST['_wp_unfiltered_html_comment'] )
 101              || ! wp_verify_nonce( $_POST['_wp_unfiltered_html_comment'], 'unfiltered-html-comment_' . $comment_post_ID )
 102          ) {
 103              kses_remove_filters(); // start with a clean slate
 104              kses_init_filters(); // set up the filters
 105          }
 106      }
 107  } else {
 108      if ( get_option('comment_registration') || 'private' == $status )
 109          wp_die( __('Sorry, you must be logged in to post a comment.') );
 110  }
 111  
 112  $comment_type = '';
 113  
 114  if ( get_option('require_name_email') && !$user->exists() ) {
 115      if ( 6 > strlen($comment_author_email) || '' == $comment_author )
 116          wp_die( __('<strong>ERROR</strong>: please fill the required fields (name, email).') );
 117      elseif ( !is_email($comment_author_email))
 118          wp_die( __('<strong>ERROR</strong>: please enter a valid email address.') );
 119  }
 120  
 121  if ( '' == $comment_content )
 122      wp_die( __('<strong>ERROR</strong>: please type a comment.') );
 123  
 124  $comment_parent = isset($_POST['comment_parent']) ? absint($_POST['comment_parent']) : 0;
 125  
 126  $commentdata = compact('comment_post_ID', 'comment_author', 'comment_author_email', 'comment_author_url', 'comment_content', 'comment_type', 'comment_parent', 'user_ID');
 127  
 128  $comment_id = wp_new_comment( $commentdata );
 129  $comment = get_comment($comment_id);
 130  
 131  /**
 132   * Perform other actions when comment cookies are set.
 133   *
 134   * @since 3.4.0
 135   *
 136   * @param object $comment Comment object.
 137   * @param WP_User $user   User object. The user may not exist.
 138   */
 139  do_action( 'set_comment_cookies', $comment, $user );
 140  
 141  $location = empty($_POST['redirect_to']) ? get_comment_link($comment_id) : $_POST['redirect_to'] . '#comment-' . $comment_id;
 142  
 143  /**
 144   * The location URI to send commenter after posting.
 145   *
 146   * @since unknown
 147   *
 148   * @param string $location The 'redirect_to' URI sent via $_POST.
 149   * @param object $comment  Comment object.
 150   */
 151  $location = apply_filters( 'comment_post_redirect', $location, $comment );
 152  
 153  wp_safe_redirect( $location );
 154  exit;