Looks like a typo on the json_encode function. The if statement is right, but the define is json_decode changing it to json_encode and it works fine.

Code in question from startup.php:

/**

• This function converts a standard # array to a PHP array without having to resort to JSON_decode which is available from 5.2x and up only
• @param string $json String with JSON data
• @return array
  */
  if ( !function_exists('json_decode') ){
  function json_decode($content, $assoc=false){
  global $homedir;
  require_once($homedir."/classes/json/JSON.php");
  if ( $assoc ){
  $json = new Services_JSON(SERVICES_JSON_LOOSE_TYPE);
  } else {
  $json = new Services_JSON;
  }
  return $json->decode($content);
  }
  }

if ( !function_exists('json_encode') ){
function json_decode($content){
global $homedir;
require_once($homedir."/classes/json/JSON.php");
$json = new Services_JSON;
return $json->encode($content);
}
}