PHP and shortcodes in widgets. Put in theme's function file.

gistfile1.txt

// Enable PHP in widgets
add_filter('widget_text','execute_php',100);
function execute_php($html){
     if(strpos($html,"<"."?php")!==false){
          ob_start();
          eval("?".">".$html);
          $html=ob_get_contents();
          ob_end_clean();
     }
     return $html;
}






// Enable shortcodes in widgets
add_filter('widget_text', 'do_shortcode');