Clean also opcache when cleaning archive if opcache_reset available.

- Format code too

main/admin/archive_cleanup.php

@@ -18,7 +18,14 @@ api_protect_admin_script(true);
 // setting breadcrumbs
 $interbreadcrumb[] = array('url' => 'index.php', 'name' => get_lang('PlatformAdmin'));
 
-$form = new FormValidator('archive_cleanup_form', 'post', '', '', array(), FormValidator::LAYOUT_BOX);
+$form = new FormValidator(
+    'archive_cleanup_form',
+    'post',
+    '',
+    '',
+    array(),
+    FormValidator::LAYOUT_BOX
+);
 $form->addButtonSend(get_lang('ArchiveDirCleanupProceedButton'));
 
 if ($form->validate()) {
@@ -34,6 +41,11 @@ if ($form->validate()) {
     if (!empty($htaccess)) {
         @file_put_contents($archive_path.'/.htaccess', $htaccess);
     }
+
+    if (function_exists('opcache_reset')) {
+        opcache_reset();
+    }
+
     if ($result) {
         Display::addFlash(Display::return_message(get_lang('ArchiveDirCleanupSucceeded')));
     } else {