Add cache stats in admin

qa-include/lang/qa-lang-admin.php

@@ -62,8 +62,8 @@ return array(
 	'caching_dir_error' => 'The directory ^ defined as QA_CACHE_DIRECTORY is not writable by the web server.',
 	'caching_dir_missing' => 'Cache directory has not been defined.',
 	'caching_dir_public' => 'The directory ^ defined as QA_CACHE_DIRECTORY must be outside the public root.',
-	'caching_disk_size' => 'Total size of cache',
-	'caching_num_files' => 'Number of files',
+	'caching_num_items' => 'Number of items in cache',
+	'caching_space_used' => 'Total size of cache',
 	'caching_title' => 'Caching',
 	'cancel_mailing_button' => 'Cancel Mailing',
 	'categories' => 'Categories',

qa-include/pages/admin/admin-default.php

@@ -1801,6 +1801,19 @@ switch ($adminsection) {
 
 			'style' => 'wide',
 
+			'fields' => array(
+				'cache_files' => array(
+					'type' => 'static',
+					'label' => qa_lang_html('admin/caching_num_items'),
+					'value' => qa_html(qa_format_number($cacheStats['files'])),
+				),
+				'cache_size' => array(
+					'type' => 'static',
+					'label' => qa_lang_html('admin/caching_space_used'),
+					'value' => qa_html(qa_format_number($cacheStats['size'] / 1048576, 1) . ' MB'),
+				),
+			),
+
 			'buttons' => array(
 				'delete_all' => array(
 					'label' => qa_lang_html('admin/caching_delete_all'),