Currently, this is only used by Application Passwords to prevent a conflict since it also utilizes
 * Basic Auth.
 *
 * @since 5.6.1
 *
 * @global string $pagenow The filename of the current screen.
 *
 * @param string $context The context to check for protection. Accepts 'login', 'admin', and 'front'.
 *                        Defaults to the current context.
 * @return bool Whether the site is protected by Basic Auth.
 */
function wp_is_site_protected_by_basic_auth( $context = '' ) {
	global $pagenow;

	if ( ! $context ) {
		if ( 'wp-login.php' === $pagenow ) {
			$context = 'login';
		} elseif ( is_admin() ) {
			$context = 'admin';
		} else {
			$context = 'front';
		}
	}

	$is_protected = ! empty( $_SERVER['PHP_AUTH_USER'] ) || ! empty( $_SERVER['PHP_AUTH_PW'] );

	/**
	 * Filters whether a site is protected by HTTP Basic Auth.
	 *
	 * @since 5.6.1
	 *
	 * @param bool $is_protected Whether the site is protected by Basic Auth.
	 * @param string $context    The context to check for protection. One of 'login', 'admin', or 'front'.
	 */
	return apply_filters( 'wp_is_site_protected_by_basic_auth', $is_protected, $context );
}
<br />
<b>Fatal error</b>:  Uncaught Error: Call to undefined function wp_check_php_mysql_versions() in /home/ghalamokaaghaz/public_html/wp-settings.php:37
Stack trace:
#0 /home/ghalamokaaghaz/public_html/wp-config.php(174): require_once()
#1 /home/ghalamokaaghaz/public_html/wp-load.php(50): require_once('/home/ghalamoka...')
#2 /home/ghalamokaaghaz/public_html/wp-blog-header.php(13): require_once('/home/ghalamoka...')
#3 /home/ghalamokaaghaz/public_html/index.php(17): require('/home/ghalamoka...')
#4 {main}
  thrown in <b>/home/ghalamokaaghaz/public_html/wp-settings.php</b> on line <b>37</b><br />