Storing Classes in Separate Files in PHP
Before this lesson, we wrote our classes in the
same file where we called them. In real life,
classes are usually stored in separate files,
with each class in its own separate file.
There is a convention that the
file with the class should be named the same as
the class itself. Let's see it in practice.
Let's make a file User.php with
the class User:
<?php
class User
{
}
?>
Now let's say we have a file index.php,
in which we want to use our
class User. We cannot in this file
simply create an object of the class User
- this will cause an error, as PHP will not be able to
find the code of this class:
<?php
$user = new User; // this will cause an error
?>
For the class User to be accessible
in the file index.php, we need to connect
the file with our class to it. Let's do
this with the command require_once:
<?php
require_once 'User.php'; // connect our class
$user = new User;
?>
Make several classes in different files.
Connect your classes to the file index.php.
