Question

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Can't pass mysqli connection in session in php

I’m trying to store a custom-made PHP MySql class into the $_SESSION. When accessed, PHP throws an error saying: “The script tried to execute a method or access a property of an incomplete object … “.

include_once 'core/mysql.php';

    $conn = new mysql();
    $_SESSION['DBCONNECTION'] = new mysql();

    $result = $_SESSION['DBCONNECTION']->query_cust($sql);  // Fails!
    $result = $conn->query_cust($sql); // Works!

I’m just tying to understand how the Sessions in PHP work and what makes the difference between defining the class as a normal variable and a variable inside $_SESSION !?

var_dump($_SESSION['DBCONNECTION']) returns:

object(__PHP_Incomplete_Class)[1]
  public '__PHP_Incomplete_Class_Name' => string 'mysql' (length=5)
  public 'con' => int 0

Answer 1

Anything that is stored inside a session needs to be serializable. Why do you want to store the connection inside a session at all? This does not make sense to me. Just reconnect with every request.