Drupal disable errors for anonymous

gistfile1.aw

<?php
// Disable all errors
function MODULE_page_alter(&$page) {
  global $user;
  if (!$user->uid) {
    unset($_SESSION['messages']['error']);
  }
}

// Disable specific errors
function MODULE_page_alter(&$page) {
  global $user;
  if (!$user->uid) {
    $errors = &$_SESSION['messages']['error'];
    foreach ($errors as $key=>$val) {
      if(strstr($val, 'ctools_get_plugins')) {
        unset($errors[$key]);
      }
    }
    if (empty($errors)) {
      unset($_SESSION['messages']['error']);
    }
  }
}