Question

I have the following, however I’m unable to access the database functions outside of the initial db class?

Thanks!

database.php

class db
{
  private $connection;

  public function __construct()
  {
    $this->connection = new PDO();
  }
}

admin.php

class admin
{
  private $connection

  public function __construct(db $connection)
  {
    $this->connection = $connection;
  }

  function myFunc()
  {
    // How do I access the connection here?
  }
}

main.php

//include db.php
//include admin.php

$connection = new db();
$admin = new admin($connection);

// How do I access the DB here?

Answer 1

First of all, why are you encapsulating PDO just to class containing that one object? Cannot you use PDO directly?

One of the common practices would be to implement getter in db class, like:

class db {
    ...

    public function getPDO(){
       return $this->connection;
    }
}

Another way is to re-implement every function (why would you do that?!), or use __call magic function…

Or just make $connection public 😉

Or you could extend PDO class (I’m not sure whether it’ll work):

class DB extends PDO {
    public function __construct ( $dsn, $username = null, $password = null, $driver_options = array()){
            parent::__construct( $dsn, $username, $password, $driver_options);
            ... more of your stuff
    }

    public function myFunc(){
        $this->...
    }
}