Administration: Remove the xmlns attribute on the <html> tag.

SergeyBiryukov · SergeyBiryukov · commit 8216e5019aa3 · 2020-06-22T21:24:44.000Z
The attribute is specific to XHTML and is not needed in HTML5. Props audrasjb, diddledan, hommealone, joyously, mukesh27, valentinbora, peterwilsoncc, SergeyBiryukov. Fixes #49126. git-svn-id: https://develop.svn.wordpress.org/trunk@48126 602fd350-edb4-49c9-b593-d223f7449a82
diff --git a/src/wp-admin/includes/template.php b/src/wp-admin/includes/template.php
@@ -2450,7 +2450,7 @@ function _wp_admin_html_begin() {
 
 	?>
 <!DOCTYPE html>
-<html xmlns="http://www.w3.org/1999/xhtml" class="<?php echo $admin_html_class; ?>"
+<html class="<?php echo $admin_html_class; ?>"
 	<?php
 	/** This action is documented in wp-admin/includes/template.php */
 	do_action( 'admin_xml_ns' );
diff --git a/src/wp-admin/install.php b/src/wp-admin/install.php
@@ -10,7 +10,7 @@
 if ( false ) {
 	?>
 <!DOCTYPE html>
-<html xmlns="http://www.w3.org/1999/xhtml">
+<html>
 <head>
 	<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
 	<title>Error: PHP is not running</title>
@@ -65,7 +65,7 @@ function display_header( $body_classes = '' ) {
 	}
 	?>
 <!DOCTYPE html>
-<html xmlns="http://www.w3.org/1999/xhtml" <?php language_attributes(); ?>>
+<html <?php language_attributes(); ?>>
 <head>
 	<meta name="viewport" content="width=device-width" />
 	<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
diff --git a/src/wp-admin/maint/repair.php b/src/wp-admin/maint/repair.php
@@ -12,7 +12,7 @@
 header( 'Content-Type: text/html; charset=utf-8' );
 ?>
 <!DOCTYPE html>
-<html xmlns="http://www.w3.org/1999/xhtml" <?php language_attributes(); ?>>
+<html <?php language_attributes(); ?>>
 <head>
 	<meta name="viewport" content="width=device-width" />
 	<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
diff --git a/src/wp-admin/setup-config.php b/src/wp-admin/setup-config.php
@@ -106,7 +106,7 @@ function setup_config_display_header( $body_classes = array() ) {
 	header( 'Content-Type: text/html; charset=utf-8' );
 	?>
 <!DOCTYPE html>
-<html xmlns="http://www.w3.org/1999/xhtml"<?php echo $dir_attr; ?>>
+<html<?php echo $dir_attr; ?>>
 <head>
 	<meta name="viewport" content="width=device-width" />
 	<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
diff --git a/src/wp-admin/upgrade.php b/src/wp-admin/upgrade.php
@@ -56,7 +56,7 @@
 header( 'Content-Type: ' . get_option( 'html_type' ) . '; charset=' . get_option( 'blog_charset' ) );
 ?>
 <!DOCTYPE html>
-<html xmlns="http://www.w3.org/1999/xhtml" <?php language_attributes(); ?>>
+<html <?php language_attributes(); ?>>
 <head>
 	<meta name="viewport" content="width=device-width" />
 	<meta http-equiv="Content-Type" content="<?php bloginfo( 'html_type' ); ?>; charset=<?php echo get_option( 'blog_charset' ); ?>" />
diff --git a/src/wp-includes/functions.php b/src/wp-includes/functions.php
@@ -3426,7 +3426,7 @@ function _default_wp_die_handler( $message, $title = '', $args = array() ) {
 		}
 		?>
 <!DOCTYPE html>
-<html xmlns="http://www.w3.org/1999/xhtml" <?php echo $dir_attr; ?>>
+<html <?php echo $dir_attr; ?>>
 <head>
 	<meta http-equiv="Content-Type" content="text/html; charset=<?php echo $parsed_args['charset']; ?>" />
 	<meta name="viewport" content="width=device-width">
diff --git a/src/wp-includes/ms-deprecated.php b/src/wp-includes/ms-deprecated.php
@@ -91,7 +91,7 @@ function graceful_fail( $message ) {
 	$message = apply_filters( 'graceful_fail', $message );
 	$message_template = apply_filters( 'graceful_fail_template',
 '<!DOCTYPE html>
-<html xmlns="http://www.w3.org/1999/xhtml"><head>
+<html><head>
 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
 <title>Error!</title>
 <style type="text/css">
diff --git a/src/wp-includes/theme-compat/header.php b/src/wp-includes/theme-compat/header.php
@@ -16,7 +16,7 @@
 );
 ?>
 <!DOCTYPE html>
-<html xmlns="http://www.w3.org/1999/xhtml" <?php language_attributes(); ?>>
+<html <?php language_attributes(); ?>>
 <head>
 <link rel="profile" href="http://gmpg.org/xfn/11" />
 <meta http-equiv="Content-Type" content="<?php bloginfo( 'html_type' ); ?>; charset=<?php bloginfo( 'charset' ); ?>" />
diff --git a/src/wp-login.php b/src/wp-login.php
@@ -86,7 +86,7 @@ function login_header( $title = 'Log In', $message = '', $wp_error = null ) {
 	$login_title = apply_filters( 'login_title', $login_title, $title );
 
 	?><!DOCTYPE html>
-	<html xmlns="http://www.w3.org/1999/xhtml" <?php language_attributes(); ?>>
+	<html <?php language_attributes(); ?>>
 	<head>
 	<meta http-equiv="Content-Type" content="<?php bloginfo( 'html_type' ); ?>; charset=<?php bloginfo( 'charset' ); ?>" />
 	<title><?php echo $login_title; ?></title>

Original file line number	Diff line number	Diff line change
`@@ -3426,7 +3426,7 @@ function _default_wp_die_handler( $message, $title = '', $args = array() ) {`
`3426`	`3426`	`}`
`3427`	`3427`	`?>`
`3428`	`3428`	`<!DOCTYPE html>`
`3429`		`-<html xmlns="http://www.w3.org/1999/xhtml" <?php echo $dir_attr; ?>>`
	`3429`	`+<html <?php echo $dir_attr; ?>>`
`3430`	`3430`	`<head>`
`3431`	`3431`	`<meta http-equiv="Content-Type" content="text/html; charset=<?php echo $parsed_args['charset']; ?>" />`
`3432`	`3432`	`<meta name="viewport" content="width=device-width">`