diff -r 490d5cc509ed -r cf61fcea0001 wp/wp-admin/export.php
--- a/wp/wp-admin/export.php	Tue Jun 09 11:14:17 2015 +0000
+++ b/wp/wp-admin/export.php	Mon Oct 14 17:39:30 2019 +0200
@@ -10,7 +10,7 @@
 require_once( dirname( __FILE__ ) . '/admin.php' );
 
 if ( !current_user_can('export') )
-	wp_die(__('You do not have sufficient permissions to export the content of this site.'));
+	wp_die(__('Sorry, you are not allowed to export the content of this site.'));
 
 /** Load WordPress export API */
 require_once( ABSPATH . 'wp-admin/includes/export.php' );
@@ -31,6 +31,7 @@
  		form.find('input:radio').change(function() {
 			filters.slideUp('fast');
 			switch ( $(this).val() ) {
+				case 'attachment': $('#attachment-filters').slideDown(); break;
 				case 'posts': $('#post-filters').slideDown(); break;
 				case 'pages': $('#page-filters').slideDown(); break;
 			}
@@ -50,8 +51,8 @@
 
 get_current_screen()->set_help_sidebar(
 	'<p><strong>' . __('For more information:') . '</strong></p>' .
-	'<p>' . __('<a href="https://codex.wordpress.org/Tools_Export_Screen" target="_blank">Documentation on Export</a>') . '</p>' .
-	'<p>' . __('<a href="https://wordpress.org/support/" target="_blank">Support Forums</a>') . '</p>'
+	'<p>' . __('<a href="https://codex.wordpress.org/Tools_Export_Screen">Documentation on Export</a>') . '</p>' .
+	'<p>' . __('<a href="https://wordpress.org/support/">Support Forums</a>') . '</p>'
 );
 
 // If the 'download' URL parameter is set, a WXR export file is baked and returned.
@@ -89,12 +90,20 @@
 
 		if ( $_GET['page_status'] )
 			$args['status'] = $_GET['page_status'];
-	} else {
+	} elseif ( 'attachment' == $_GET['content'] ) {
+		$args['content'] = 'attachment';
+
+		if ( $_GET['attachment_start_date'] || $_GET['attachment_end_date'] ) {
+			$args['start_date'] = $_GET['attachment_start_date'];
+			$args['end_date'] = $_GET['attachment_end_date'];
+		}
+	}
+	else {
 		$args['content'] = $_GET['content'];
 	}
 
 	/**
-	 * Filter the export args.
+	 * Filters the export args.
 	 *
 	 * @since 3.5.0
 	 *
@@ -143,45 +152,58 @@
 ?>
 
 <div class="wrap">
-<h2><?php echo esc_html( $title ); ?></h2>
+<h1><?php echo esc_html( $title ); ?></h1>
 
 <p><?php _e('When you click the button below WordPress will create an XML file for you to save to your computer.'); ?></p>
 <p><?php _e('This format, which we call WordPress eXtended RSS or WXR, will contain your posts, pages, comments, custom fields, categories, and tags.'); ?></p>
 <p><?php _e('Once you&#8217;ve saved the download file, you can use the Import function in another WordPress installation to import the content from this site.'); ?></p>
 
-<h3><?php _e( 'Choose what to export' ); ?></h3>
+<h2><?php _e( 'Choose what to export' ); ?></h2>
 <form method="get" id="export-filters">
+<fieldset>
+<legend class="screen-reader-text"><?php _e( 'Content to export' ); ?></legend>
 <input type="hidden" name="download" value="true" />
-<p><label><input type="radio" name="content" value="all" checked="checked" /> <?php _e( 'All content' ); ?></label></p>
-<p class="description"><?php _e( 'This will contain all of your posts, pages, comments, custom fields, terms, navigation menus and custom posts.' ); ?></p>
+<p><label><input type="radio" name="content" value="all" checked="checked" aria-describedby="all-content-desc" /> <?php _e( 'All content' ); ?></label></p>
+<p class="description" id="all-content-desc"><?php _e( 'This will contain all of your posts, pages, comments, custom fields, terms, navigation menus, and custom posts.' ); ?></p>
 
 <p><label><input type="radio" name="content" value="posts" /> <?php _e( 'Posts' ); ?></label></p>
 <ul id="post-filters" class="export-filters">
 	<li>
-		<label><?php _e( 'Categories:' ); ?></label>
+		<label><span class="label-responsive"><?php _e( 'Categories:' ); ?></span>
 		<?php wp_dropdown_categories( array( 'show_option_all' => __('All') ) ); ?>
+		</label>
 	</li>
 	<li>
-		<label><?php _e( 'Authors:' ); ?></label>
-<?php
+		<label><span class="label-responsive"><?php _e( 'Authors:' ); ?></span>
+		<?php
 		$authors = $wpdb->get_col( "SELECT DISTINCT post_author FROM {$wpdb->posts} WHERE post_type = 'post'" );
-		wp_dropdown_users( array( 'include' => $authors, 'name' => 'post_author', 'multi' => true, 'show_option_all' => __('All') ) );
-?>
+		wp_dropdown_users( array(
+			'include' => $authors,
+			'name' => 'post_author',
+			'multi' => true,
+			'show_option_all' => __( 'All' ),
+			'show' => 'display_name_with_login',
+		) ); ?>
+		</label>
 	</li>
 	<li>
-		<label><?php _e( 'Date range:' ); ?></label>
-		<select name="post_start_date">
-			<option value="0"><?php _e( 'Start Date' ); ?></option>
+		<fieldset>
+		<legend class="screen-reader-text"><?php _e( 'Date range:' ); ?></legend>
+		<label for="post-start-date" class="label-responsive"><?php _e( 'Start date:' ); ?></label>
+		<select name="post_start_date" id="post-start-date">
+			<option value="0"><?php _e( '&mdash; Select &mdash;' ); ?></option>
 			<?php export_date_options(); ?>
 		</select>
-		<select name="post_end_date">
-			<option value="0"><?php _e( 'End Date' ); ?></option>
+		<label for="post-end-date" class="label-responsive"><?php _e( 'End date:' ); ?></label>
+		<select name="post_end_date" id="post-end-date">
+			<option value="0"><?php _e( '&mdash; Select &mdash;' ); ?></option>
 			<?php export_date_options(); ?>
 		</select>
+		</fieldset>
 	</li>
 	<li>
-		<label><?php _e( 'Status:' ); ?></label>
-		<select name="post_status">
+		<label for="post-status" class="label-responsive"><?php _e( 'Status:' ); ?></label>
+		<select name="post_status" id="post-status">
 			<option value="0"><?php _e( 'All' ); ?></option>
 			<?php $post_stati = get_post_stati( array( 'internal' => false ), 'objects' );
 			foreach ( $post_stati as $status ) : ?>
@@ -194,26 +216,36 @@
 <p><label><input type="radio" name="content" value="pages" /> <?php _e( 'Pages' ); ?></label></p>
 <ul id="page-filters" class="export-filters">
 	<li>
-		<label><?php _e( 'Authors:' ); ?></label>
-<?php
+		<label><span class="label-responsive"><?php _e( 'Authors:' ); ?></span>
+		<?php
 		$authors = $wpdb->get_col( "SELECT DISTINCT post_author FROM {$wpdb->posts} WHERE post_type = 'page'" );
-		wp_dropdown_users( array( 'include' => $authors, 'name' => 'page_author', 'multi' => true, 'show_option_all' => __('All') ) );
-?>
+		wp_dropdown_users( array(
+			'include' => $authors,
+			'name' => 'page_author',
+			'multi' => true,
+			'show_option_all' => __( 'All' ),
+			'show' => 'display_name_with_login',
+		) ); ?>
+		</label>
 	</li>
 	<li>
-		<label><?php _e( 'Date range:' ); ?></label>
-		<select name="page_start_date">
-			<option value="0"><?php _e( 'Start Date' ); ?></option>
+		<fieldset>
+		<legend class="screen-reader-text"><?php _e( 'Date range:' ); ?></legend>
+		<label for="page-start-date" class="label-responsive"><?php _e( 'Start date:' ); ?></label>
+		<select name="page_start_date" id="page-start-date">
+			<option value="0"><?php _e( '&mdash; Select &mdash;' ); ?></option>
 			<?php export_date_options( 'page' ); ?>
 		</select>
-		<select name="page_end_date">
-			<option value="0"><?php _e( 'End Date' ); ?></option>
+		<label for="page-end-date" class="label-responsive"><?php _e( 'End date:' ); ?></label>
+		<select name="page_end_date" id="page-end-date">
+			<option value="0"><?php _e( '&mdash; Select &mdash;' ); ?></option>
 			<?php export_date_options( 'page' ); ?>
 		</select>
+		</fieldset>
 	</li>
 	<li>
-		<label><?php _e( 'Status:' ); ?></label>
-		<select name="page_status">
+		<label for="page-status" class="label-responsive"><?php _e( 'Status:' ); ?></label>
+		<select name="page_status" id="page-status">
 			<option value="0"><?php _e( 'All' ); ?></option>
 			<?php foreach ( $post_stati as $status ) : ?>
 			<option value="<?php echo esc_attr( $status->name ); ?>"><?php echo esc_html( $status->label ); ?></option>
@@ -226,9 +258,29 @@
 <p><label><input type="radio" name="content" value="<?php echo esc_attr( $post_type->name ); ?>" /> <?php echo esc_html( $post_type->label ); ?></label></p>
 <?php endforeach; ?>
 
+<p><label><input type="radio" name="content" value="attachment" /> <?php _e( 'Media' ); ?></label></p>
+<ul id="attachment-filters" class="export-filters">
+	<li>
+		<fieldset>
+		<legend class="screen-reader-text"><?php _e( 'Date range:' ); ?></legend>
+		<label for="attachment-start-date" class="label-responsive"><?php _e( 'Start date:' ); ?></label>
+		<select name="attachment_start_date" id="attachment-start-date">
+			<option value="0"><?php _e( '&mdash; Select &mdash;' ); ?></option>
+			<?php export_date_options( 'attachment' ); ?>
+		</select>
+		<label for="attachment-end-date" class="label-responsive"><?php _e( 'End date:' ); ?></label>
+		<select name="attachment_end_date" id="attachment-end-date">
+			<option value="0"><?php _e( '&mdash; Select &mdash;' ); ?></option>
+			<?php export_date_options( 'attachment' ); ?>
+		</select>
+		</fieldset>
+	</li>
+</ul>
+
+</fieldset>
 <?php
 /**
- * Fires after the export filters form.
+ * Fires at the end of the export filters form.
  *
  * @since 3.5.0
  */