Time limit on recursive procedure?

I have a recursive procedure, and I set the time limit each time I enter it: function rec_scan($directory, ......) { set_time_limit (1); if (is_dir($new_file)) { rec_scan ($new_file, ....) } } The way I read the manual, the timer should be reset each time I call rec_scanl, but I seem to have to set a longer time limit than I would have anticipated, and I wonder if in fact the original time limit still applies to the original invocation?