What is the best method in PHP to start a program (exe) without waiting for it to finish?

To start a program (exe) without waiting for it to finish in PHP, you can use the `exec()` function with the `&` operator at the end of the command. This will run the program in the background and continue executing the PHP script without waiting for the program to finish.

$command = 'start /B program.exe';
exec($command);