How Can I Run Sudo-Required Shell Scripts from PHP Without Password Prompts?

How to Execute SUDO-Required Shell Scripts from PHP

Executing shell scripts that require elevated privileges from within PHP can be challenging, as the shell_exec() function does not support password prompts. However, there are ways to overcome this limitation and automate script execution.

Solution: Modify the Sudoers File

One effective solution is to edit the sudoers file (typically located at /etc/sudoers) and add a rule that allows the specified script to be executed without a password. To do this, follow these steps:

1. Open the sudoers file with root privileges using the following command:

   sudo visudo

2. Add a line in the following format:

   www-data ALL=NOPASSWD: /path/to/script

   where www-data is the username of the web server and /path/to/script is the path to the bash script that requires elevated privileges.

3. Save and close the sudoers file.

By making this modification, you effectively grant permission to the web server user to execute the specified script without being prompted for a password.

Once you have completed these steps, you can call your bash script from PHP using the shell_exec() function as usual. The script will run with elevated privileges, without any password prompts.

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