AJAX to a PHP class that extends, the included classes are not passed

Question

I am calling a function via AJAX from a PHP class that extends another class but is not included in that file instead it was included in a different file. To elaborate here's my code:

Client:

$('.username').change(function(){
        var indexOfNumber = $(this).attr('class').indexOf('d');
        var number = $(this).attr('class').substring(Number(indexOfNumber)+1);

        $.ajax({
            url: 'class1.php',
            complete: function(response) {
                alert(response.responseText);
            },
            error: function(){
                alert("error");
            }
        });

        $('.userrole.d'+number).html(number);
    });

Class1:

class class1 extends class2
{
    function class1()
    {
        $this->class2(); << I am getting an error here
    }

The error that I am getting is:

Class 'class2' not found in (location of class1).

class2 is included in the config.php file of the project and thus it's not included again in the files, when I call that file from AJAX it doesn't seem to see the previously included PHP files.

Any way around this?

Answer 1

The only way around it is to require the necessary files in class1.php. Or you could include a file that loads a custom autoloader which can dynamically load files when requesting classes.