echo "<pre>";
print_r(get_extension_funcs("session"));
echo "</pre>";
/*
run:
Array
(
[0] => session_name
[1] => session_module_name
[2] => session_save_path
[3] => session_id
[4] => session_regenerate_id
[5] => session_decode
[6] => session_encode
[7] => session_start
[8] => session_destroy
[9] => session_unset
[10] => session_set_save_handler
[11] => session_cache_limiter
[12] => session_cache_expire
[13] => session_set_cookie_params
[14] => session_get_cookie_params
[15] => session_write_close
[16] => session_status
[17] => session_register_shutdown
[18] => session_commit
)
*/