Ik probeer in mijn classes gebruik te maken van PDO connectie, maar krijg telkens deze foutmelding: Notice: Undefined property: Bootstrap::$db in E:\root\2013\AVDirect\libs\Question.php on line 32
Op regel 32 staat:
$this->db->select("SELECT `q_id`, `q_sub`, `q_title`, `q_content`, `q_explanation`, `a_type` FROM `question` WHERE `q_id` = '$q_id'");Bootstrap.php:
<?php
class Bootstrap {
function __construct() {
// Get URL pieces
if(isset($_GET['url'])) {
$url = Functions::getUrlPieces($_GET['url']);
} else {
$url[0] = '';
}
// Include homepage if no specific page was requested
if (empty($url[0])) {
require 'pages/index.php';
return false;
}
// If specific page was requested, check whether that page exists
// If the page does exist, include the page
// If the page does not exist, show errorpage.
$file = 'pages/' . $url[0] . '.php';
if (file_exists($file)) {
require $file;
} else {
require 'pages/404.php';
}
}
}
?>
Index.php:
<?php
$pdo = new PDO('mysql:host=localhost;port=3307;dbname=' . DB_NAME, DB_USER, DB_PASS);
$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$result = $pdo->query('SELECT * FROM answer WHERE q_id = 1');
# Map results to object
$result->setFetchMode(PDO::FETCH_CLASS, 'Question');
while ($question = $result->fetch()) {
# Call our custom full_name method
echo $question->full_name();
}
?>
Question.php:
<?php
class Question extends Database {
public $db = "";
public $q_id = "";
public function __construct() {
$this->db = new Database(DB_TYPE, DB_HOST, DB_PORT, DB_NAME, DB_USER, DB_PASS);
}
public function full_name() {
return 'Nummer: ' . $this->q_id;
}
public function q_data_from_q_id($q_id) {
$this->db->select("SELECT `q_id`, `q_sub`, `q_title`, `q_content`, `q_explanation`, `a_type` FROM `question` WHERE `q_id` = '$q_id'");
}
?>
Database.php:
<?php
class Database extends PDO {
public function __construct($DB_TYPE, $DB_HOST, $DB_PORT = 3307, $DB_NAME, $DB_USER, $DB_PASS) {
parent::__construct($DB_TYPE . ':host=' . $DB_HOST . ';port=' . $DB_PORT . ';dbname=' . $DB_NAME, $DB_USER, $DB_PASS);
//parent::setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTIONS);
}
/**
* select
* @param string $sql An SQL string
* @param array $array Parameters to bind
* @param constant $fetchMode A PDO Fetch mode
* @return mixed
*/
public function select($sql, $array = array(), $fetchMode = PDO::FETCH_ASSOC) {
$sth = $this->prepare($sql);
foreach ($array as $key => $value) {
$sth->bindValue("$key", $value);
}
$sth->execute();
return $sth->fetchAll($fetchMode);
}
}
?>