Description:
------------
The error message is given below.

PDOException: SQLSTATE[HY093]: Invalid parameter number: number of bound variables does not match number of tokens in xxx.php

It would be - extremely - helpful if the error message contained a list of the matched tokens or some information on where the token substitution failed.



Reproduce code:
---------------
$query = "SELECT *
FROM example_table et
WHERE start_date BETWEEN ':sStartDate' AND ':sEndDate'
 AND user_id = :iId"

<snip prepare statement>

$sStatement->bindParam(':iId',         $iUserId,      PDO::PARAM_INT);
$sStatement->bindParam(':sStartDate',  $sStartDate,    PDO::PARAM_STR);
$sStatement->bindParam(':sEndDate',    $sEndDate,      PDO::PARAM_STR);
$sStatement->execute();

The error PDOException: SQLSTATE[HY093]: Invalid parameter number: number of bound variables does not match number of tokens in xxx.php

Expected result:
----------------
Expect to see either no error because it worked or a message such as

PDOException: SQLSTATE[HY093]: Invalid parameter number: number of bound variables does not match number of tokens in xxx.php. Cannot find   token :sStartDate

Actual result:
--------------
PDOException: SQLSTATE[HY093]: Invalid parameter number: number of bound variables does not match number of tokens in xxx.php