note 36145 deleted from ref.exec by cmb

Note Submitter: jeremy at ntb dot co dot nz ---- If an error occurs in the code you're trying to exec(), it can be challenging to figure out what's going wrong, since php echoes back the stdout stream rather than the stderr stream where all the useful error reporting's done. The solution is to add the code "2>&1" to the end of your shell command, which redirects stderr to stdout, which you can then easily print using something like print shellcommand 2>&1.