Struggling with the transition from Procedural to Object Oriented programming, so please excuse any untidiness or errors in my code. Here is an example where I am passing posts through jQuery to a class for updating a record when a user checks a checkbox:
This is the database connection:
class db {
private $host ;
private $username;
private $password;
private $dbname;
protected function conn()
{
$this->host = "localhost";
$this->username = "root";
$this->password = "";
$this->dbname = "mytest";
$db = new mysqli($this->host, $this->username, $this->password, $this->dbname);
if($db->connect_errno > 0){
die('Unable to connect to database [' . $db->connect_error . ']');
}
return $db;
}
}
This is the update class:
class updOrders extends db {
public $pid;
public $proc;
public function __construct()
{
$this->pid = isset($_POST['pid']) ? $_POST['pid'] : 0;
$this->proc = isset($_POST['proc']) ? $_POST['proc'] : 1;
// $stmt = $this->conn()->query("UPDATE tblorderhdr SET completed = ".$this->proc." WHERE orderid = ".$this->pid);
$stmt = $this->conn()->prepare("UPDATE tblorderhdr SET completed = ? WHERE orderid = ?");
$stmt->bind_param('ii', $this->proc, $this->pid);
$stmt->execute();
if($stmt->error)
{
$err = $stmt->error ;
} else {
$err = 'ok';
}
/* close statement */
$stmt->close();
echo json_encode($err);
}
}
$test = new updOrders;
When I comment out the prepare statement and run the query directly (commented out) it updates successfully. However, when I try to run it as a prepared statement, it returns an error "MySQL server has gone away".