What are the potential risks of relying solely on robots.txt for access control?

Relying solely on robots.txt for access control can be risky as it is a voluntary protocol that bots can choose to ignore. To enhance security, it is recommended to implement server-side access control in addition to robots.txt. 

// Implementing server-side access control in PHP
if ($_SERVER['REMOTE_ADDR'] != 'allowed_ip_address') {
    header('HTTP/1.0 403 Forbidden');
    echo 'Access Forbidden';
    exit;
}

Keywords

robots.txt access control security vulnerability PHP authentication

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