PDO return $row from a class method - oop

Question

Hey guys I am learning OOP in php. I come across some issue, when I try to customize PDO in my own class. Basically I have tried to return the row and fetch it outside my class. Unfortunately I would not work. I get this error "Call to a member function fetch() on a non-object". Have a look and give me some tips if You can. Many thanks.
$connection = new MySql(DBUSER, DBPASS);
$row = $connection->query("select * from users", "name");
while($row->fetch(PDO::FETCH_ASSOC)){
echo "<p>". $row["name"] ."</p>";
}
And here is how the MySql class look like:
class MySql{
private $dbc;
private $user;
private $pass;
function __construct($user="root", $pass=""){
$this->user = $user;
$this->pass = $pass;
try{
$this->dbc = new PDO("mysql:host=localhost; dbname=DBNAME;charset=utf8", $user, $pass);
}
catch(PDOException $e){
echo $e->getMessage();
echo "Problem z Połączeniem do MySql sprawdź haslo i uzytkownika";
}
}
public function query($query, $c1=""){
$mysqlquery = $this->dbc->prepare($query);
$mysqlquery->execute();
return $row = $mysqlquery->fetch(PDO::FETCH_ASSOC);
/* I WANT TO PERFORM COMENTED CODE OUTSIDE THE CLASS
while($row = $mysqlquery->fetch(PDO::FETCH_ASSOC)){
if($c1!=""){
echo "<p>". $row[$c1] ."</p>";
}
}
*/
}

Answer 1

If you want to return $mysqlquery to iterate over it, you have to return $mysqlquery, not just one row.
Here is a better version of your class, with dramatically improved error handling and security. But still awful configurability though.
class MySql{
private $dbc;
function __construct($user="root", $pass=""){
$dsn = "mysql:host=localhost; dbname=DBNAME;charset=utf8";
$opt = array(
PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC
);
$this->dbc = new PDO($dsn, $user, $pass, $opt);
}
public function query($query, $data = array()){
$stm = $this->dbc->prepare($query);
$stm->execute($data);
return $stm;
}
}
$connection = new MySql(DBUSER, DBPASS);
$stm = $connection->query("select * from users WHERE name = ?", array("name"));
while($row = $stm->fetch()){
echo "<p>". $row["name"] ."</p>";
}