Question

I want to $st_id in a function in my model class in a mvc project, as you see below, but it get me an error that $st_id is not defined. what I can do for resolve this problem ?

<?php

@session_start();
$st_id=$_SESSION['username'];
if (!isset($_SESSION['USERNAME']))
{
header('Location: signin.php');
}
//////////////////////    
class model
{
    private $result;
    public $rp_result;
    //////////
    public function exe_query()
    {
        $mysqldb = new MySQLDatabase();
        $result=$mysqldb->query('CALL view_report('.$this->st_id.');');
        $this->rp_result=$mysqldb->fetch_all($result);
    }
}   
?>

Answer 1

You have to declare it within the class if you’re using it with $this

class model {
    public $st_id;

    public function __construct() {
        @session_start();
        $this->st_id = $_SESSION['username'];
    }

    public function exe_query()
    {
        $mysqldb = new MySQLDatabase();
        $result=$mysqldb->query('CALL view_report('.$this->st_id.');');
        $this->rp_result=$mysqldb->fetch_all($result);
    }
}