PHP Server Side Printing Ubuntu Server

Question

I have been all over stack looking at what is required to do this and have wound up being slightly confused.

Lets get one thing straight this is a local based intra-

Answer 1

Judicious use of php's shell_exec() should allow you to print PDFs synchronously, immediately after their creation, thus avoiding the need for bash.

I've not used shell_exec() for printing so can't help with the detail but essentially, if you can successfully compose a UNIX print command, then you can write the shell_exec() instruction.