make from within a PHP script?

[james]

Hi,
I've created a small makefile in which I redirect grep's output
to create the target.

The problem arises when using PHP's exec function to issue make
on the makefile; it seems to break the redirection of grep's
output to the target.

I've posted on the PHP-general mailing list,
but thought perhaps it maybe better to ask here.

post on php-general:
http://marc.theaimsgroup.com/?l=php-general&m=116957362732676&w=2

Any help appreciated,
cheers,
James

BTW:using debian sarge.