Provided by: allegro5-doc_5.0.10-2_all 

NAME
al_set_physfs_file_interface - Allegro 5 API
SYNOPSIS
#include <allegro5/allegro_physfs.h>
void al_set_physfs_file_interface(void)
DESCRIPTION
After calling this, subsequent calls to al_fopen(3alleg5) will be handled by PHYSFS_open(). Operations
on the files returned by al_fopen(3alleg5) will then be performed through PhysicsFS.
At the same time, all filesystem functions like al_read_directory(3alleg5) or al_create_fs_entry(3alleg5)
will use PhysicsFS.
This functions only affects the thread it was called from.
To remember and restore another file I/O backend, you can use
al_store_state(3alleg5)/al_restore_state(3alleg5).
SEE ALSO
al_set_new_file_interface(3alleg5).
Allegro reference manual al_set_physfs_file_interface(3alleg5)()