Using MySQLi from another class in PHP

Question

I really hope someone can help me figure out what I am missing. I have upgraded my installation from PHP 5.6 to 7.0 and this has forced me to update from Mysql to Mysqli whi

Answer 1

There are several bad practices that led you to this error.

Clearly, extending User from a Database is a wrong move. Also, the whole Database class is rather useless as it doesn't do anything useful.

Hence I would suggest to

• get rid of the useless Database class.
• create a single $db instance from vanilla mysqli.
• pass it as a constructor parameter into every class that needs a database connection

database.php:

set_charset('utf8mb4');

myapi.php

db = $db;
    }

    public function getUser($id)
    {
        $sql = "SELECT * FROM users where id=?";
        $stmt = $this->db->prepate($sql);
        $stmt->bind_param("s", $id);
        $stmt->execute();
        $result = $stmt->get_result();
        return $result->fetch_assoc();
    }
}

app.php

getUser($_POST['id']);