php auth_http class library for identity verification_PHP tutorial

require_once("Auth/HTTP.php");
//Set database connection options
$auth_options=array(
'dsn'=>"mysql://root:1981427@localhost/test", //Database connection string
'table' =>"tablename1", //Table name
'usernamecol'=>"username", //Column used to store user names
'passwordcol'=>"password", //Used for Column for storing passwords
'cryptType'=>"none", //Password encryption method
);
//Create an Auth_HTTP object and specify the use of DB as the information source
$auth = new Auth_HTTP ("DB", $auth_options);
//Description information on the settings dialog box
$auth->setRealm('Login');
//When the identity verification fails or the user cancels Error message
$auth->setCancelText('Identity verification failed!');
//Start user identity verification
$auth->start();
//If Identity verification is successful, display information
if($auth->getAuth())
{
echo "Identity verification is successful, welcome". $auth->username;
};
?>