Question

I am attempting to put all my database connections in 1 php file, rather than in each of my individual php pages. I have the following:

//conn.php:

<?php

class conn {
   var $username = "name";
   var $password = "password";
   var $server = "localhost";
   var $port = "3306";
   var $databasename = "db";
   var $tablename = "tablename";
   var $connection;

   public function getConnected() {

       $this->connection = mysqli_connect(
       $this->server,
       $this->username,
       $this->password,
       $this->databasename,
       $this->port
        );
}


}
?>

// file.php:

<?php
require_once("conn.php");

class myClass{

public function con() {

$conn = new conn();
$conn->getConnected();    
}

public function myF() {
$stmt = mysqli_prepare($conn->connection, "SELECT * FROM $conn->tablename");

mysqli_stmt_execute($stmt);
    }
}
?>

I then call this as follows:

$myNew = new myClass();
$myNew->con();
$myNew->myF();

When I call this, I get the following error:

Undefined property: myClass::$connection

What am I doing wrong?

Answer 1

In myClass, you connect in con(), but $conn is a variable local to that method; i.e. the class itself does not have access to it. To fix this,

class myClass {

    public $conn;

    public function con() {
        $this->conn = new conn();
        $this->conn->getConnected();    
    }

    public function myF() {
        $stmt = mysqli_prepare($this->conn->connection, "SELECT * FROM {$this->conn->tablename}");
        mysqli_stmt_execute($stmt);
    }

}