SQLSTATE[HY093] : pdo statement during insert into mysql db

Question

Here it is my php code to realize insert into db:

<?php

require_once "includes/db_data_inc.php";

try 
{
    $DBH = new PDO("mysql:host=$db_host;dbname=$db_name",$db_user,$db_pass);

    $DBH->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

    $cathy = new patient($_POST['name'],
                         $_POST['surname'],
                         $_POST['address'],
                         $_POST['birth-place'],
                         $_POST['province'],
                         $_POST['dt'],
                         $_POST['gender'],
                         $_POST['select']);

    $STH = $DBH->prepare("INSERT INTO users (name, 
                                            surname, 
                                            address, 
                                            birth_place,
                                            province,
                                            dt,
                                            sex,
                                            case) value (:name
                                                        :surname,
                                                        :address,
                                                        :birth_place,
                                                        :province,
                                                        :dt,
                                                        :sex,
                                                        :case)");

    $STH->execute((array)$cathy);

}
catch (PDOException $pdoe) 
{
    error_log($pdoe->getMessage());
    die("An error was encountered!");
}

?>

Here it is db_data_inc.php where are stored db_info and where I create the object patient

    $db_host = 'localhost';

$db_name = 'main_db';

$db_user = 'root';

$db_pass = 'root';

/* Create an object patient */

class patient
{
    public $name;
    public $surname;
    public $address;
    public $birth_place;
    public $province;
    public $birth_date;
    public $sex;
    public $case;

    function __construct($nm,$sur,$addr,$bp,$pr,$bd,$sx,$cs)
    {
        $this->name = $nm;
        $this->surname = $sur;
        $this->address = $addr;
        $this->birth_place = $bp;
        $this->province = $pr;
        $this->birth_date = $bd;
        $this->sex = $sx;
        $this->case = $cs;
    }

}

I get this error:

[10-Feb-2012 21:14:29] SQLSTATE[HY093]: Invalid parameter number: parameter was not defined

But I didn't realize the reason...why I got this error? someone can help me? Where is the mistake?

Answer 1

Not sure if this is the cause of your error, but in your insert statement, CASE is a MySQL reserved word and should be escaped with backticks.

$STH = $DBH->prepare("INSERT INTO users (name, 
                                        surname, 
                                        address, 
                                        birth_place,
                                        province,
                                        dt,
                                        sex,
                                        `case`) value (:name
                                                    :surname,
                                                    :address,
                                                    :birth_place,
                                                    :province,
                                                    :dt,
                                                    :sex,
                                                    :case)");

Answer 2

In your query you use :dt as a placeholder, but in the class constructor you use $this->birth_date .

Once casted, this will create an array with index ' birth_date' , which doesn't match with the named parameter "dt" : choose one or the other.