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
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