Implement EDIFACT application into website

I have created a site for the logistics market. One part of the site is for the users to handle their transactions using a form on the site, and they can communicate using the site as well. (Currently they use emails back and forth) The typical process of a transaction is: Quotation request (sent to single or multiple agents) User gets quotes User chooses an agent A transaction is created **User looks for ocean or air schedule** **They check/askfor rates** They select a vessel or Flight **They book the vessel or flight** Shipment picked up at destination Shipment delivered to consignee (client) **Shipment can during transaction be tracked and traced** The bold parts can be handled through third party systems. I now want to integrate my application so that my site communicates with these systems, and they use EDIfact. I eed the above mentioned processes implemented into my LAMP structured web site.