I have a point of sale application which is developed using a code igniter frame work,which works only in chrome browser, I have two buttons in my application
send to kitchen
pay BILL
when I click sent to kitchen button a print should be come in printer which is kept in kitchen, when I click pay BILL a bill should be come from the printer which is kept in cashier table.
I will be OK to do this with any libraries or google chrome API's
you can do this by sending a text file (most POS printer support text file printing) to the attached network printers (IP address and port).
you can use exec() function of PHP for that.
go through the thread below for the clue
printing over network from PHP app