I am having the strangest problem using system() or exec() or any
variation. None of them work on the Fedora Core 3 system that was
just loaded. The PHP is Version 4.3.11 with Apache 2.0.52, the default
installation for Fedora Core 3. Everything in PHP works as expected
except when trying a system call. If I run :
<?
system("/bin/ls /tmp");
?>
on my OS X (Apache/1.3.33 (Darwin) PHP/4.3.4) this returns the desired
results, a listing of the tmp directory. On the Fedora box I get
nothing, a blank page. There is content in the /tmp directory on the
Fedora box.
Compare the output of phpinfo() on each machine. Investigate any differences...
Also maybe this will help:
http://us4.php.net/features.safe-mode
-philip