我的PDO查询似乎随机停止工作？

Question

How can I troubleshoot further? I have 3 styles of querying. This is for a fetchType = 'single' ( single row that is) and a populated parameterArray

public function query($fetchType, $queryType, $parameterArray=null)
{
    $query=$this->sql_array[$queryType];
    if($parameterArray==null)
    {
        $pdoStatement = $this->db_one->query($query);
        $results = $pdoStatement->fetchAll(PDO::FETCH_ASSOC);
        return $results;
    }
    $this->db_one->quote($query);
    $pdoStatement = $this->db_one->prepare($query);
    $results = $pdoStatement->execute($parameterArray);
    if($fetchType=='single')
    {
        $results = $pdoStatement->fetch(PDO::FETCH_ASSOC);
    }
    else if($fetchType=='multiple')
    {
        $results = $pdoStatement->fetchAll(PDO::FETCH_ASSOC);
    }
    return $results;
}

My results is coming back false and I see no data in the sql table.

I verified that the queryType exists in the lookup table and that other queries are working.

Here is the actual query. I inserted new lines to make readable.

"signup_insert" =>            
"INSERT INTO credentials 
(h_token, h_file, h_pass, email, name, picture, privacy) 
VALUES (?, ?, ?, ?, ?, ?, ?)"

Here is the debug code I created:

$pipe['debug_h_token']=$h_token;
$pipe['debug_h_file']=$h_file;
$pipe['debug_h_pass']=$h_pass;
$pipe['debug_email']=$this->TO->get('email');
$pipe['debug_name']=$this->TO->get('name');
$pipe['debug_picture']=$picture;
$pipe['debug_privacy']=$privacy;

$test = $this->DBO->query('single', 'signup_insert', array(
    $h_token,
    $h_file,
    $h_pass,
    $this->TO->get('email'),
    $this->TO->get('name'),
    $picture,
    $privacy
));
$pipe['debug_test'] = $test;