PHP - Disable/enable maintenance file

6fbfd5e68d3306e51350bea0232f8fa5.php

<?php

try {

    $filename = 'maintenance.enable';

    if (file_exists($filename)) {
        unlink($filename);
        echo "Application is now public";
    } else {
        file_put_contents($filename, '');
        echo "Application is now hidden";
    }

} catch(\Exception $e) {
    echo "Oops. Something went wrong here.";
}