exec("which convert", $my_convert_path) not working!!!

[Grant_Cooper]

I tested this code on my FreeBSD unix box but I can't seem to get exec to work? Do I have to set up permissions or someing in my php.ini file. This is driving me up the wall.

exec("which convert", $my_convert_path);

echo "<br>test " . $my_convert_path[0];
echo "<br>test " . $my_convert_path[1];
echo "<br>test " . $my_convert_path;

My results:

test
test
test 1

Thanks in advance.
My safe mode is OFF. Is there something I'm missing or does this look right?

[dalecosp]

And what is the path? My FBSD box can't find convert...

#which convert
convert: Command not found.