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PHP

Posted by Emmanuele Massimi
Emmanuele Massimi
7,420 Points

Best way to include PDO object from a separate file in a class?

Hello All,

I am currently trying to apply the skills I learnt here on a little project and I have run into the following little dilemma.

I have created a class that is in its own file and a database connection file that is also on its own file. How can I use the PDO instance (I called it $db) inside my class? Right now I have done the following:

<?php
    require_once($_SERVER['DOCUMENT_ROOT'] . '/lib/database.php');

    class MyClass
    {

      public function myFunction() 
      {
        global $db;
        // etc.
      }

    }
?>

This works, but I'm not sure whether this is the best way of doing this. Could anybody please enlighten me?

Thanks a lot for your time! :)

1 Answer

Shawn Gregory
Shawn Gregory
Courses Plus Student 40,672 Points

Hello,

You could try the following:

<?php

class MyClass {
   private $db;

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

?>

This will allow you to pass in the connection instance when you instantiate the class.

$conn = new MyClass($db);

Hope this is what you are looking for.

Cheers!

Emmanuele Massimi
Emmanuele Massimi
7,420 Points

That's just brilliant, thank you very much! :)