wp_notify_moderator( int $comment_id )

function wp_notify_moderator($comment_id) {
	global $wpdb;

	$maybe_notify = get_option( 'moderation_notify' );

	/**
	 * Filters whether to send the site moderator email notifications, overriding the site setting.
	 *
	 * @since WP-4.4.0
	 *
	 * @param bool $maybe_notify Whether to notify blog moderator.
	 * @param int  $comment_ID   The id of the comment for the notification.
	 */
	$maybe_notify = apply_filters( 'notify_moderator', $maybe_notify, $comment_id );

	if ( ! $maybe_notify ) {
		return true;
	}

	$comment = get_comment($comment_id);
	$post = get_post($comment->comment_post_ID);
	$user = get_userdata( $post->post_author );
	// Send to the administration and to the post author if the author can modify the comment.
	$emails = array( get_option( 'admin_email' ) );
	if ( $user && user_can( $user->ID, 'edit_comment', $comment_id ) && ! empty( $user->user_email ) ) {
		if ( 0 !== strcasecmp( $user->user_email, get_option( 'admin_email' ) ) )
			$emails[] = $user->user_email;
	}

	$switched_locale = switch_to_locale( get_locale() );

	$comment_author_domain = @gethostbyaddr($comment->comment_author_IP);
	$comments_waiting = $wpdb->get_var("SELECT count(comment_ID) FROM $wpdb->comments WHERE comment_approved = '0'");

	// The blogname option is escaped with esc_html on the way into the database in sanitize_option
	// we want to reverse this for the plain text arena of emails.
	$blogname = wp_specialchars_decode(get_option('blogname'), ENT_QUOTES);
	$comment_content = wp_specialchars_decode( $comment->comment_content );

	switch ( $comment->comment_type ) {
		case 'trackback':
			/* translators: 1: Post title */
			$notify_message  = sprintf( __('A new trackback on the post "%s" is waiting for your approval'), $post->post_title ) . "\r\n";
			$notify_message .= get_permalink($comment->comment_post_ID) . "\r\n\r\n";
			/* translators: 1: Trackback/pingback website name, 2: website IP address, 3: website hostname */
			$notify_message .= sprintf( __( 'Website: %1$s (IP address: %2$s, %3$s)' ), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n";
			/* translators: 1: Trackback/pingback/comment author URL */
			$notify_message .= sprintf( __( 'URL: %s' ), $comment->comment_author_url ) . "\r\n";
			$notify_message .= __('Trackback excerpt: ') . "\r\n" . $comment_content . "\r\n\r\n";
			break;
		case 'pingback':
			/* translators: 1: Post title */
			$notify_message  = sprintf( __('A new pingback on the post "%s" is waiting for your approval'), $post->post_title ) . "\r\n";
			$notify_message .= get_permalink($comment->comment_post_ID) . "\r\n\r\n";
			/* translators: 1: Trackback/pingback website name, 2: website IP address, 3: website hostname */
			$notify_message .= sprintf( __( 'Website: %1$s (IP address: %2$s, %3$s)' ), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n";
			/* translators: 1: Trackback/pingback/comment author URL */
			$notify_message .= sprintf( __( 'URL: %s' ), $comment->comment_author_url ) . "\r\n";
			$notify_message .= __('Pingback excerpt: ') . "\r\n" . $comment_content . "\r\n\r\n";
			break;
		default: // Comments
			/* translators: 1: Post title */
			$notify_message  = sprintf( __('A new comment on the post "%s" is waiting for your approval'), $post->post_title ) . "\r\n";
			$notify_message .= get_permalink($comment->comment_post_ID) . "\r\n\r\n";
			/* translators: 1: Comment author name, 2: comment author's IP address, 3: comment author's hostname */
			$notify_message .= sprintf( __( 'Author: %1$s (IP address: %2$s, %3$s)' ), $comment->comment_author, $comment->comment_author_IP, $comment_author_domain ) . "\r\n";
			/* translators: 1: Comment author URL */
			$notify_message .= sprintf( __( 'Email: %s' ), $comment->comment_author_email ) . "\r\n";
			/* translators: 1: Trackback/pingback/comment author URL */
			$notify_message .= sprintf( __( 'URL: %s' ), $comment->comment_author_url ) . "\r\n";
			/* translators: 1: Comment text */
			$notify_message .= sprintf( __( 'Comment: %s' ), "\r\n" . $comment_content ) . "\r\n\r\n";
			break;
	}

	/* translators: Comment moderation. 1: Comment action URL */
	$notify_message .= sprintf( __( 'Approve it: %s' ), admin_url( "comment.php?action=approve&c={$comment_id}#wpbody-content" ) ) . "\r\n";

	if ( EMPTY_TRASH_DAYS ) {
		/* translators: Comment moderation. 1: Comment action URL */
		$notify_message .= sprintf( __( 'Trash it: %s' ), admin_url( "comment.php?action=trash&c={$comment_id}#wpbody-content" ) ) . "\r\n";
	} else {
		/* translators: Comment moderation. 1: Comment action URL */
		$notify_message .= sprintf( __( 'Delete it: %s' ), admin_url( "comment.php?action=delete&c={$comment_id}#wpbody-content" ) ) . "\r\n";
	}

	/* translators: Comment moderation. 1: Comment action URL */
	$notify_message .= sprintf( __( 'Spam it: %s' ), admin_url( "comment.php?action=spam&c={$comment_id}#wpbody-content" ) ) . "\r\n";

	/* translators: Comment moderation. 1: Number of comments awaiting approval */
	$notify_message .= sprintf( _n('Currently %s comment is waiting for approval. Please visit the moderation panel:',
 		'Currently %s comments are waiting for approval. Please visit the moderation panel:', $comments_waiting), number_format_i18n($comments_waiting) ) . "\r\n";
	$notify_message .= admin_url( "edit-comments.php?comment_status=moderated#wpbody-content" ) . "\r\n";

	/* translators: Comment moderation notification email subject. 1: Site name, 2: Post title */
	$subject = sprintf( __('[%1$s] Please moderate: "%2$s"'), $blogname, $post->post_title );
	$message_headers = '';

	/**
	 * Filters the list of recipients for comment moderation emails.
	 *
	 * @since WP-3.7.0
	 *
	 * @param array $emails     List of email addresses to notify for comment moderation.
	 * @param int   $comment_id Comment ID.
	 */
	$emails = apply_filters( 'comment_moderation_recipients', $emails, $comment_id );

	/**
	 * Filters the comment moderation email text.
	 *
	 * @since WP-1.5.2
	 *
	 * @param string $notify_message Text of the comment moderation email.
	 * @param int    $comment_id     Comment ID.
	 */
	$notify_message = apply_filters( 'comment_moderation_text', $notify_message, $comment_id );

	/**
	 * Filters the comment moderation email subject.
	 *
	 * @since WP-1.5.2
	 *
	 * @param string $subject    Subject of the comment moderation email.
	 * @param int    $comment_id Comment ID.
	 */
	$subject = apply_filters( 'comment_moderation_subject', $subject, $comment_id );

	/**
	 * Filters the comment moderation email headers.
	 *
	 * @since WP-2.8.0
	 *
	 * @param string $message_headers Headers for the comment moderation email.
	 * @param int    $comment_id      Comment ID.
	 */
	$message_headers = apply_filters( 'comment_moderation_headers', $message_headers, $comment_id );

	foreach ( $emails as $email ) {
		@wp_mail( $email, wp_specialchars_decode( $subject ), $notify_message, $message_headers );
	}

	if ( $switched_locale ) {
		restore_previous_locale();
	}

	return true;
}