How to use PDO prepare more than oncee in a class - php

Question

class dbConnection {
function connect(){
try{
$this->db_conn = new PDO("mysql:host=$this->db_host;dbname=$this->db_name", $this->db_user, $this->db_pass);
return $this->db_conn;
} catch(PDOException $e) {
return $e->getMessage();
}
}
}
class student{
public $link;
public function __construct(){
$db_connection = new dbConnection();
$this->link = $db_connection->connect();
return $this->link;
}
public function checkLogin($username,$password){
$query = $this->link->prepare("SELECT * FROM studentprofiles where UserName = :uname AND LogPassword = (select md5(:upassword));");
$query->execute(array(':uname' => $username, ':upassword' => $password));
$count = $query->rowCount();
if($count === 1){
$this->setSession($username);
}
return $count;
$query = null;
}
public static function display(){
$query = $this->link->prepare("SELECT ForeName, Surname FROM studentprofiles where UserName = :uname;"); //getting error here: Fatal error: Using $this when not in object context
$query->execute(array(':uname' => self::getSession()));
while($row = $query->fetch(PDO::FETCH_ASSOC)) {
printf (" <span id='WelcomeName'> Welcome: %s %s\n </span>",$row[0],$row[1]);
}
$query = null;
}
}
Error using $this again to prepare another select statement, how do I use it again for another function in the same class? Thank You
Appreciate any help, really stuck on this problem

Answer 1

hi you can check you code and i prefer asign in to value the conection example
$conn = new PDO('mysql:host=localhost;dbname=myDatabase', $username, $password);
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
and in your function you make some one how this
function connect(){
try{
$conn = new PDO('mysql:host=localhost;dbname=myDatabase', $username, $password);
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
return $conn;
} catch(PDOException $e) {
return $e->getMessage();
}
}
in a complete example this:
$id = 5;
try {
$conn = new PDO('mysql:host=localhost;dbname=myDatabase', $username, $password);
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$stmt = $conn->prepare('SELECT * FROM myTable WHERE id = :id');
$stmt->execute(array('id' => $id));
while($row = $stmt->fetch()) {
print_r($row);
}
} catch(PDOException $e) {
echo 'ERROR: ' . $e->getMessage();
}
please try and good luck