$_SERVER['PHP_AUTH_USER']

$_SERVER['PHP_AUTH_PW']

<?php
     
if ((!isset( $PHP_AUTH_USER )) || (!isset($PHP_AUTH_PW))) {

    header( 'WWW-Authenticate: Basic realm="Private"' );
    header( 'HTTP/1.0 401 Unauthorized' );
    echo 'Authorization Required.';
    exit;

} else {

    echo "You entered $PHP_AUTH_USER for a username.<BR>";
    echo "You entered $PHP_AUTH_PW for a password.<BR>";

}

?>