Hi, I'm designing a website in php that requires shell_exec(). I need shell_exec() to run a program on my server called "antiword", but I get no output when using shell_exec() but I do get output if I run the same command in my shell. (If I run shell_exec(ls) I get output.)

$cmd = "./antiword -a a4 a.doc > a.pdf";//If I run this manually it works fine
shell_exec($cmd);

I'm in the correct directory and a.doc is present. I get no error messages.

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Ensure the web server user (e.g. "apache") can read and execute this program too. If not, you may need change ownership and permissions on your shell prog file.

Also, for better control, try executing shell commands using proc_open(). this will give you access to exit code and stderr stream, therefore easier to know what went wrong.

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