Laravel 500 error, Base64 images, Ajax and array's

Question

I am uploading, or better said, trying to upload images to my Laravel website with Ajax. I convert the images to Base64 and upload them to the server. It works, sort of.

My problem is that I get a 500 error.

It's the response from the server in an Iframe

The thing is, I do not get this error all the times. I only get it when I try to do something with the response.

This is my method where I handle the upload. When I run it like this everything works and I do not get the error.

public function upload(Request $request)
{

    return var_dump($request->all());
}

But it is an array. So to do something with it I have to specify the key. Only problem is that as soon I do that I get the 500 error.

I want to convert the base64 string back to an image so I want to do this:

file_put_contents('foo.png', base64_decode($request->all()[0]));

But this creates the error. the [0] at the end of $request->all() .

I can't remove it because it needs a base64 string and not an array. I also wanted to know what would happen if I just add [0] to the end of $request-all() in the var dump but I still got the errror.

I just don't get it.

This is my Ajax call:

    $.ajax({
            url: "/admin/upload",
            type: "POST",
            data: queue,
            processData: false,
            error: function(xhr, status, error) {
                let err = xhr.responseText;
                //console.log(err);
                $('#upload-InnerPanel').append("<iframe width='600' height='500' src='" + err +"'> </iframe>")
            },
            success: function (xhr) {
                console.log(xhr);
            },
            headers: {
                'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content')
            }
        });

Answer 1

Answered in the comments, but posting this as an answer anyway:

The $request value that is received isn't numerically indexed, so you need to access it using its name. Instead of $request->all()[0] , you would need to use $request->theData , or whatever the value is named in the form.