Description:
------------
Created a Database class containing an insert function.
The function takes an array of statements and values
and executes each one within a transaction.

I test it using two statements.  The 2nd statement uses
currval('mysequence') to insert an ID that is the same 
as the one generated by the first statement.

Problem is the inserts do not take place, and there is
also no exception raised so it looks like the transaction
committed just fine.

Reproduce code:
---------------
Below is the function from the Database.php class:

function insert($inserts)
{
    $this->dbh->beginTransaction();
    try {
        foreach ($inserts as $insert) {
            $stmt = $this->dbh->prepare($insert['query']);
            $stmt->execute($insert['values']);
        }
    } catch (Exception $e) {
        $this->dbh->rollBack();
        echo "Failed: " . $e->getMessage();
        return 0;
    }
    $this->dbh->commit();
    return 1;
}

======================================================
I call the Database.php class from here:

<?php
require ('./lib/Database.php');

$db = new Database(NULL);
$inserts[] = array("query"=>'insert into t_company (name, url, description)  values (?, ?, ?)', "values"=>array('IBM','www.ibm.com','The IBM Company'));
$inserts[] = array("query"=>'insert into t_doc     (company_id, doctype,   private_flag) values (?, ?, ?)', "values"=>array('currval(\'t_company_company_id_seq\')','patent','f'));
$db->insert($inserts)

?>


Expected result:
----------------
The company IBM should be inserted into table t_company.

A row should be inserted into the table t_doc with the
column company_id pointing to the IBM row in t_company.