note 22202 deleted from function.shell-exec by irchtml

Note Submitter: cvaida@email.ro ---- I tried shell_exec(), backtick operator and system() to execute a shell script (in RedHat Linux 7.0, using Apache server), that works correctly from the command line, and it doesn't work when executed from a PHP script. I also tried to redirect the output to a file in /var/www/html and if I create the file it does not write anything into it,although from the command line it works. I don't understand the problem, because the PHP script executes, for example, the ls command, and returns the result in the page.