From 92ad9c0a3ea0e5a4c5108304e06bf3ebf6adc155 Mon Sep 17 00:00:00 2001
From: Sergey Biryukov <sergeybiryukov@git.wordpress.org>
Date: Mon, 16 Jul 2018 12:06:02 +0000
Subject: [PATCH] Privacy: do not show the comment cookies opt-in checkbox (on
 the front-end comments form) when comment cookies are disabled.

Props felipeelia, johnbillion.
Merges [43370] to the 4.9 branch.
Fixes #44342.

git-svn-id: https://develop.svn.wordpress.org/branches/4.9@43449 602fd350-edb4-49c9-b593-d223f7449a82
---
 src/wp-includes/comment-template.php | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/src/wp-includes/comment-template.php b/src/wp-includes/comment-template.php
index 7bde60c517..f24c68025b 100644
--- a/src/wp-includes/comment-template.php
+++ b/src/wp-includes/comment-template.php
@@ -2196,7 +2196,6 @@ function comment_form( $args = array(), $post_id = null ) {
 	$req      = get_option( 'require_name_email' );
 	$html_req = ( $req ? " required='required'" : '' );
 	$html5    = 'html5' === $args['format'];
-	$consent  = empty( $commenter['comment_author_email'] ) ? '' : ' checked="checked"';
 	$fields   =  array(
 		'author'  => '<p class="comment-form-author">' . '<label for="author">' . __( 'Name' ) . ( $req ? ' <span class="required">*</span>' : '' ) . '</label> ' .
 					 '<input id="author" name="author" type="text" value="' . esc_attr( $commenter['comment_author'] ) . '" size="30" maxlength="245"' . $html_req . ' /></p>',
@@ -2204,11 +2203,15 @@ function comment_form( $args = array(), $post_id = null ) {
 					 '<input id="email" name="email" ' . ( $html5 ? 'type="email"' : 'type="text"' ) . ' value="' . esc_attr( $commenter['comment_author_email'] ) . '" size="30" maxlength="100" aria-describedby="email-notes"' . $html_req . ' /></p>',
 		'url'     => '<p class="comment-form-url"><label for="url">' . __( 'Website' ) . '</label> ' .
 					 '<input id="url" name="url" ' . ( $html5 ? 'type="url"' : 'type="text"' ) . ' value="' . esc_attr( $commenter['comment_author_url'] ) . '" size="30" maxlength="200" /></p>',
-		'cookies' => '<p class="comment-form-cookies-consent"><input id="wp-comment-cookies-consent" name="wp-comment-cookies-consent" type="checkbox" value="yes"' . $consent . ' />' .
-					 '<label for="wp-comment-cookies-consent">' . __( 'Save my name, email, and website in this browser for the next time I comment.' ) . '</label></p>',
 	);
 
-	$required_text = sprintf( ' ' . __('Required fields are marked %s'), '<span class="required">*</span>' );
+	if ( has_action( 'set_comment_cookies', 'wp_set_comment_cookies' ) ) {
+		$consent           = empty( $commenter['comment_author_email'] ) ? '' : ' checked="checked"';
+		$fields['cookies'] = '<p class="comment-form-cookies-consent"><input id="wp-comment-cookies-consent" name="wp-comment-cookies-consent" type="checkbox" value="yes"' . $consent . ' />' .
+							 '<label for="wp-comment-cookies-consent">' . __( 'Save my name, email, and website in this browser for the next time I comment.' ) . '</label></p>';
+	}
+
+	$required_text = sprintf( ' ' . __( 'Required fields are marked %s' ), '<span class="required">*</span>' );
 
 	/**
 	 * Filters the default comment form fields.