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Ole Vølund Skov Mortensen
27,797 PointsHow come you can access the $db variable in collection Class?
OK, mabye i failed listening in the magic construct function class (here refers to a school class) but I fail to understand this concept. Where did the $db variable come from in Collection class. in the config file it add the connection: $db variable to the collection class. If the connection to the database was done in the config file. what's the connection class constructor function then doing?? I don't see a reference to this class any where obvious. Sorry, for this stupid question right now but i need to know to follow the logic of this.
1 Answer
Jennifer Nordell
Treehouse TeacherHi there! In the config.php file you create a new database connection. Then at the very end you can see the creation of a new instance of Collection.
$directory = new Collection($db);
This creates a new instance of Collection with the new database connection you just made being passed into the constructor.
In Collection.php you have the constructor which takes a parameter and sets the private variable of $db to the thing that was passed in. In this case, the connection to the database.
function __construct($db)
{
$this->db = $db;
}
This creates a new Collection with the value of $db being set to whatever was sent in by config.php.
Hope this clarifies things!
