android volley sending array list to php

i need some help. i am working with volley library and i have succeeded in sending single parameters to the php script but when it comes to sending and array list of arrays , i cant find out where to begin my android application is a user form to create a order of medicine items which is to be sent to server for processing. for that i tended to store the user input into an sqlite database continuously until the users presses the submit button where the application should retrieve the transaction from sqlite db as a table or array of string arrays and send the request to php script to store that values in an Mysql db .

it is unclear to me how to transfer sqlite data to php , i would appreciate any help that will get me started , thank you in advance