CRUD - PHP PDO Error - php

Question

I Have a Problem With Source Code PHP PDO . I Try make a CRUD with PHP PDO , but when i try source code for delete and when I run a script the Data do not want to be erased .. I apologize if my speaking was nothing wrong, I am from Indonesian
Thank's Before
Script function delete :
public function deleteData($id)
{
// fungsi menghapus data dari database
$this->id = $id;
$this->sql = "DELETE FROM student WHERE id=:id";
$this->q = $this->dbh->prepare($sql);
$this->q->bindParam(":id",$this->id);
$this->q->execute();
return true;
}
Script delete.php
<?php
include "belajar_crud.php";
$obj = new crud;
$id = isset($_GET['id']) ? $_GET['id']:'';
$obj->deleteData($id);
?>

Answer 1

Change this line:
$this->q = $this->dbh->prepare($sql);
Into this:
$this->q = $this->dbh->prepare($this->sql);
This is the only error I see in the code...
If this is not the case, you need to provide more information.

Answer 2

why you no try this?
config.php:
define('HOST','your host');
define('BD','your database');
define('USER','your user');
define('PASS','your password');
BD.class.php:
class BD{
private static $conn;
public function __construct(){}
public function conn(){
if(is_null(self::$conn)){
self::$conn = new PDO('mysql:host='.HOST.';dbname='.BD.'',''.USER.'',''.PASS.'');
}
return self::$conn;
}
}
your code of delete:
#BD::conn();
$query = #BD::conn()->prepare("DELETE FROM YOURTABLE WHERE ID = ?");
if($query->execute(array($this->id))){
echo "<script>alert('Delete Successful');</script>";
}