PHP basic auth example

test-php-basic-auth.php

<?php
function require_auth() {
	$AUTH_USER = 'admin';
	$AUTH_PASS = 'admin';
	header('Cache-Control: no-cache, must-revalidate, max-age=0');
	$has_supplied_credentials = !(empty($_SERVER['PHP_AUTH_USER']) && empty($_SERVER['PHP_AUTH_PW']));
	$is_not_authenticated = (
		!$has_supplied_credentials ||
		$_SERVER['PHP_AUTH_USER'] != $AUTH_USER ||
		$_SERVER['PHP_AUTH_PW']   != $AUTH_PASS
	);
	if ($is_not_authenticated) {
		header('HTTP/1.1 401 Authorization Required');
		header('WWW-Authenticate: Basic realm="Access denied"');
		exit;
	}
}

Beautiful solution.
Can I have digest authentication ???

Great! Thank you MAN!

Thank you. This is testing if authentication is properly set.
What I need to know is, how to setup $_SERVER['PHP_AUTH_USER']
Do I just, assign it a parameter $_SERVER['PHP_AUTH_USER'] = $enteredvalue; ?

function require_http_auth()
{
/*
# Если CGI, то в .htaccess
RewriteEngine On
RewriteCond %{HTTP:Authorization} ^(.)
RewriteRule . - [e=HTTP_AUTHORIZATION:%1]
*/

header('Cache-Control: no-cache, must-revalidate, max-age=0');

if (! empty($_SERVER['REDIRECT_HTTP_AUTHORIZATION']))
{
	preg_match('/^Basic\s+(.*)$/i', $_SERVER['REDIRECT_HTTP_AUTHORIZATION'], $user_pass);
	
	$str = base64_decode($user_pass[1]);
	
	list( $_SERVER['PHP_AUTH_USER'], $_SERVER['PHP_AUTH_PW'] ) = explode(':', $str);
}

$has_supplied_credentials = !(empty($_SERVER['PHP_AUTH_USER']) && empty($_SERVER['PHP_AUTH_PW']));

$is_not_authenticated = (
	! $has_supplied_credentials 
	|| $_SERVER['PHP_AUTH_USER'] != AUTH_USER 
	|| $_SERVER['PHP_AUTH_PW']   != AUTH_PASS
);

if ($is_not_authenticated)
{
	header('HTTP/1.1 401 Authorization Required');
	header('WWW-Authenticate: Basic realm="Access denied"');
	exit;
}

}

@mathritter someone just gave me a cookie!

Awesome. Thanks!

Hi! Is safe for protect a directory or url adding these precautions?

• Are hidden url/folder, don't visible from external
• Connection is HTTPS

I hope there are no errors in my function.

           public function require_auth()
            {
                
                /*
                    RewriteEngine On
                    RewriteCond %{HTTP:Authorization} ^(.)
                    RewriteRule . - [e=HTTP_AUTHORIZATION:%1]
                */

                $AUTH_USER = 'myUser';
                $AUTH_PASS = 'myPass';

                header('Cache-Control: no-cache, must-revalidate, max-age=0');

                if (! empty($_SERVER['REDIRECT_HTTP_AUTHORIZATION']))
                {
                    preg_match('/^Basic\s+(.*)$/i', $_SERVER['REDIRECT_HTTP_AUTHORIZATION'], $AUTH_PASS);
                    
                    $str = base64_decode($AUTH_PASS[1]);
                    
                    list( $_SERVER['PHP_AUTH_USER'], $_SERVER['PHP_AUTH_PW'] ) = explode(':', $str);
                }
    
                $has_supplied_credentials = !(empty($_SERVER['PHP_AUTH_USER']) && empty($_SERVER['PHP_AUTH_PW']));

                $is_not_authenticated = (
                    !$has_supplied_credentials ||
                    $_SERVER['PHP_AUTH_USER'] != $AUTH_USER || $_SERVER['PHP_AUTH_PW']   != $AUTH_PASS
                );

                if ($is_not_authenticated) {
                    header('HTTP/1.1 401 Authorization Required');
                    header('WWW-Authenticate: Basic realm="Access denied"');
                    exit;
                }

            }

Thanks!