What security considerations should be taken into account when using PHP in command line scripts?

When using PHP in command line scripts, it is important to sanitize user input to prevent injection attacks. Additionally, avoid executing shell commands with user input directly to prevent command injection vulnerabilities. It is also recommended to restrict file permissions and use secure coding practices to minimize the risk of security breaches.

// Sanitize user input to prevent injection attacks
$input = escapeshellarg($_GET['input']);

// Avoid executing shell commands with user input directly
$command = "ls " . $input;
$output = shell_exec($command);

// Restrict file permissions and use secure coding practices
chmod("/path/to/file", 0600);