Build PHP Xero Class to Get and Post invoices

I'm looking for a PHP class that can talk to Xero to get and post invoices. I don't want to use the calcinai version as it's too overkill for what I want. To get the invoices, I want to do the following: Give an invoice ID and get a detailed result $result = $xero->get_invoice($invoice_id); Give a date and get all invoices modified since then $result = $xero->get_invoices('2019-01-01'); Post a draft invoice to Xero by sending the data in an array and returning the invoice ID $data = array('client_id'=>'123','invoice_date'=>date('Y-m-d'),'invoice_total'=>'200'); $result = $xero->put_invoice($data);