Admin Panel: Information Manager - cleanup and refactoring.

site/plugins/admin/classes/InformationManager.php

@@ -9,6 +9,29 @@ class InformationManager
     public static function getInformationManager()
     {
         Registry::set('sidebar_menu_item', 'infomation');
+
         Themes::view('admin/views/templates/system/information/list')->display();
     }
+
+    /**
+     * Tests whether a file is writable for anyone.
+     *
+     * @param  string  $file File to check
+     * @return bool
+     */
+    public static function isFileWritable(string $file) : bool
+    {
+        // Is file exists ?
+        if (! file_exists($file)) {
+            throw new RuntimeException(vsprintf("%s(): The file '{$file}' doesn't exist", array(__METHOD__)));
+        }
+
+        // Gets file permissions
+        $perms = fileperms($file);
+
+        // Is writable ?
+        if (is_writable($file) || ($perms & 0x0080) || ($perms & 0x0010) || ($perms & 0x0002)) {
+            return true;
+        }
+    }
 }