Setting argc/argv and including a PHP CLI script

Question

If I've got a CLI script foo written in PHP that requires various command line options, can I invoke foo from another PHP script by first writing to $argv and $argc and then doing include('foo')? (Assume foo starts with <?php, not a hash-bang directive.)

Even if this would "work", why is it a bad idea? (apart from namespace collision).

Answer 1

It is not necessary to write anything into $argv /$argc - the variables will be available to the include like they are to the main script.