PHP Warning: Invalid UTF-8 sequence in argument in /ajax.php on line 24

[swguy]

PHP Warning: Invalid UTF-8 sequence in argument in /ajax.php on line 24



Prior to

      echo json_encode ($result);exit();

should there be something like

      $result = htmlentities((string)$result, ENT_QUOTES, 'utf-8', FALSE);

[DrByte]

Can you describe the steps you took to trigger the error message?

[swguy]

Checkout by credit card (Paypal Express) with this item - the checkout confirmation page is blank in the center column, but the remainder of the page including the footer do render.

The fix I suggested above seems to resolve this issue.

[mc12345678]

Similar issue identified at: https://www.zen-cart.com/showthread....ment-with-V154

The direction of this thread appeared to resolve the issue.

[lat9]

FWIW, this change breaks one of my commercial plugins. That plugin returns an array of information to an AJAX request and the suggestion of simply casting the result to a string wrecks havoc!

Here's the change that I made, allowing the return values to be string-value-containing-names or array elements:

<?php
/**
 * ajax front controller
 *
 * @package core
 * @copyright Copyright 2003-2015 Zen Cart Development Team
 * @copyright Portions Copyright 2003 osCommerce
 * @license http://www.zen-cart.com/license/2_0.txt GNU Public License V2.0
 * @version GIT: $Id: Author: Ian Wilson   Modified in v1.6.0 $
 */
require ('includes/application_top.php');

//-bof-lat9  *** 1 of 2 ***
function htmlentities_mixed ($mixed_value, $flags, $encoding = 'utf-8', $double_encode = true) {
  if (!is_array ($mixed_value)) {
    $result = htmlentities ((string)$mixed_value, $flags, $encoding, $double_encode);
    
  } else {
    $result = array ();
    foreach ($mixed_value as $key => $value) {
      $result[$key] = htmlentities_mixed ($value, $flags, $encoding, $double_encode);

    }
  }
  return $result;
  
}
//-eof-lat9  *** 1 of 2 ***

$language_page_directory = DIR_WS_LANGUAGES.$_SESSION['language'].'/';
if (isset ($_GET['act'])&&isset ($_GET['method'])) {
  $className = 'zc'.ucfirst ($_GET['act']);
  $classFile = $className.'.php';
  if (file_exists (DIR_FS_CATALOG.DIR_WS_CLASSES.'ajax/'.$classFile)) {
    require (DIR_FS_CATALOG.DIR_WS_CLASSES.'ajax/'.$classFile);
    $class = new $className ();
    if (method_exists ($class, $_GET['method'])) {
      $result = call_user_func (array(
          $class,
          $_GET['method']
      ));
      
//-bof-lat9  *** 2 of 2 ***
      $result = htmlentities_mixed ($result, ENT_QUOTES, 'utf-8', FALSE);
//-eof-lat9  *** 2 of 2 ***

      echo json_encode ($result);exit();
    } else {
      echo 'method error';
    }
  }
}

[swguy]

FWIW, this change breaks one of my commercial plugins....

What is the name of the plugin (so folks who are searching will come to this thread)?