Description:
------------
i develop webapps in PHP OOP and mysql using mysqli library. this very simple 
query 

SELECT * FROM fornitori ORDER BY ragSociale

works ok on localhost on my PC (Windows 7 Pro x64, apache 2.2.17-PHP 5.3.5-MySQL 
5.1.55) but on my VPS (centOS 5.5, apache 2.2.16-PHP 5.3.2-MySQL 5.1.48) 
doesnt'work! in fact i have crerated a PHP function classes to use databases and 
in some of these i use the following code to check errors:

echo $this->message('Query Error: ' . $mysqli->errno . '\nQuery: ' . $sql . 
'\n\nError: ' . $mysqli->error);

while in localhost tehre isn't any error on my VPS i have teh following error:

Query Error:
Query: SELECT * FROM fornitori ORDER BY ragSociale
Error:

without any sort of error description. on other web server where i have a site 
(apache 2.2.16-PHP 5.2.13-MySQL 5.1.51) there isn't any error! so i think: is 
this a bug of PHP 5.3 using MySQLi ????

Test script:
---------------
function arrayRecords($sql) {
  $mysqli = new mysqli($this->host, $this->user, $this->pass, $this->data);
  if ($mysqli) {
    $result = $mysqli->query($sql);
    if ($result) {
      if ($result->num_rows) {
        while ($row = $result->fetch_assoc())
          $array[] = $row;
      } else
          $array = array();
    } else
        echo $this->message('Query Error: ' . $mysqli->errno . '\nQuery: ' . $sql . '\n\nError: ' . $mysqli->error);
  } else
      echo $this->message('DB Connect Error: ' . $mysqli->connect_errno . '\nError: ' . $mysqli->connect_error);
      //$result->close();
      $mysqli->close();
      return $array;
}
// with PHP 5.2 works, with PHP 5.3 error!
$rows = $arrayRecords($sql_query);

Expected result:
----------------
nothing, it must show a window with the query results