Description:
------------
PDO_INFORMIX bindValue(...) or bindParam(...) does not work as expected, there is no diference using prepare(...) with a direct sql query or a stored procedure query.
It seems the binded value lose their value and if you're using these value in the WHERE clause then always fail the condition.

Configuration:
Ubuntu 8.10
Apache/2.2.9 (Ubuntu) PHP/5.2.6-2ubuntu4.1 with Suhosin-Patch
Informix CSDK 3.50 UC.3DE.Linux
IBM Informix Dynamic Server Version 10.00.FC4
PDO_INFORMIX driver 1.2.6

Reproduce code:
---------------
mypdo1.php [using bindValue(...), DON'T WORK]
<?
$Pdo = new PDO('informix: host=myhost; server=myserver; protocol=onsoctcp; service=11000; database=empleados', 'user', 'password');
$Stmt = $Pdo->prepare('EXECUTE PROCEDURE test(?)');
$Stmt->bindValue(1, $sString);
$sString = "myString";
$Stmt->execute();
$aRow = $Stmt->fetch(PDO::FETCH_NUM);
echo '<pre>'; var_dump($aRow); echo '</pre>';
?>

mypdo2.php [using direct value in sql query, IT WORK]
<?
$Pdo = new PDO('informix: host=myhost; server=myserver; protocol=onsoctcp; service=11000; database=empleados', 'user', 'password');
$Stmt = $Pdo->prepare('EXECUTE PROCEDURE test("myString")');
$Stmt->execute();
$aRow = $Stmt->fetch(PDO::FETCH_NUM);
echo '<pre>'; var_dump($aRow); echo '</pre>';
?>

Expected result:
----------------
Same result in both scripts
array(2) {
  [0]=>
  string(9) "JARAMILLO"
  [1]=>
  string(3) "LEO"
}

Actual result:
--------------
mypdo1.php
array(2) {
  [0]=>
  NULL
  [1]=>
  NULL
}

mypdo2.php
array(2) {
  [0]=>
  string(9) "JARAMILLO"
  [1]=>
  string(3) "LEO"
}