PHP PDO class use in different class (doesn't work) - php

Question

I wanna get data on table and write a class. But this class doesn't work because pdo doesn't access. How can I get table data with this class?
$db = new PDO("mysql:host=localhost;dbname=xxx;charset=utf8", "xxx", "xxx");
class uye extends PDO{
var $id;
var $kadi;
function cek($id){
$query = $db->query("SELECT * FROM btc WHERE id='{$id}'", PDO::FETCH_ASSOC);
if ( $query->rowCount() ) {
foreach( $query as $row ){
$this->id=$row["id"];
$this->kadi=$row["kadi"];
}
}
}
}
$bilgiler=new uye;
$bilgiler->cek(1);
echo $bilgiler->kadi;

Answer 1

So I'm running this off of fetching all data as I dont know where you're getting $id from.
I generally break my code up into files and folders as I found this easier to work with and others to work on.
// database connection file (dbc.php)
class Database
{
private $host = "127.0.0.1";
private $db = "";
private $user = "";
private $password = "";
public $conn;
public function dbConnect()
{
$this->conn = null;
try
{
$this->conn = new PDO("mysql:host=" . $this->host . ";dbname=" . $this->db, $this->user, $this->password);
$this->conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
}
catch (PDOException $exception)
{
echo "Connection error: " . $exception->getMessage();
}
return $this->conn;
}
}
I then make a common file, this is where you can store all of your frequently used functions or your static functions
// Common file (common.php)
require_once('dbc.php');
class DBCommon
{
private $conn;
public function __construct()
{
$database = new Database();
$db = $database->dbConnect();
$this->conn = $db;
}
public function run($sql)
{
$stmt = $this->conn->prepare($sql);
return $stmt;
}
}
So to explain this a little more, you will see a function of run() this is just to save the tedious $this->conn->prepare on every query.. Now you can run $this->run()
The next would be your class file.. this is where your logic goes:
// your class file... (class.btc.php)
require_once "common.php";
class BTC extends DBCommon
{
public function getQuery()
{
$stmt = $this->run("SELECT * FROM `btc`");
$stmt->execute();
while ($row = $stmt->fetch(PDO::FETCH_OBJ))
{
$rows[] = $row;
}
return $rows;
}
}
Self explanatory..
And then your calling method.. Lets say index.php
// File you're calling your class from (index.php)
require_once "class.btc.php";
$fetch = new BTC();
$returnData = $fetch->getQuery();
foreach ($returnData as $data)
{
echo
"<p>$data->something</p>
<p>$data->somethingElse</p>";
}
It seems a little long winded I know, but the time you'll save overall will help!