What role do file permissions (chmod) play in PHP script execution on a server?

File permissions (chmod) play a crucial role in PHP script execution on a server by controlling who can read, write, and execute files. Setting appropriate file permissions ensures that only authorized users can access and modify files, enhancing security and preventing unauthorized access to sensitive data. It is important to set the correct permissions for PHP scripts to ensure they can be executed properly and securely.

// Set appropriate file permissions for PHP script execution
chmod("path_to_your_php_script.php", 0644);