Call a class in magento2 code which resides in root

Question

May be a very bad question. Not sure.

Just a brief

I am trying to add simplesamlphp in magento2.

1) I added it through composer and its added inside vendor directory. And i can access the classes like this $auth = new \SimpleSAML_Auth_Simple('default-sp'); And this works..and i can access functions also.

Now the issue is its not written keeping magento2's structure in mind. It will work only if i put the whole code in magento2's root.

EDIT

Now if i put the whole code in magento root and try to access like this(dont get me wrong..just try to check with object manager. Wont use it. Chill.)

$object_manager = \Magento\Framework\App\ObjectManager::getInstance();
 $dir = $object_manager->get('\Magento\Framework\Filesystem\DirectoryList'); 
 $base = $dir->getRoot();
 $lib_file = $base.'/simplesamlphp/simplesamlphp/lib/_autoload.php';
 require_once($lib_file);
 $auth = new SimpleSAML_Auth_Simple('default-sp');

It gives me this

Fatal error: Class 'Magento\Customer\Controller\Account\SimpleSAML_Auth_Simple' not found. // BTW trying to call it from LoginPost action.

How to include classes which are at magento2's root? (Probably autoload wont work but still)

Answer 1

Try with backslash before

$auth = new \SimpleSAML_Auth_Simple('default-sp');
 ^

---

Multiple namespaces may also be declared in the same file. There are simple and bracketed allowed syntaxes.

Simple combination syntax

<?php
namespace MyProject;
const CONNECT_OK = 1;
class Connection { /* ... */ }
function connect() { /* ... */ }
namespace AnotherProject;
const CONNECT_OK = 1;
class Connection { /* ... */ }
function connect() { /* ... */ }

This syntax is not recommended for combining namespaces into a single file. Instead it is recommended to use the alternate bracketed syntax.

Bracketed syntax

<?php
namespace MyProject {
const CONNECT_OK = 1;
class Connection { /* ... */ }
function connect() { /* ... */ }
}
namespace AnotherProject {
const CONNECT_OK = 1;
class Connection { /* ... */ }
function connect() { /* ... */ }
}

It is strongly discouraged as a coding practice to combine multiple namespaces into the same file. The primary use case is to combine multiple PHP scripts into the same file.

To combine global non-namespaced code with namespaced code, only bracketed syntax is supported. Global code should be encased in a namespace statement with no namespace name as in:

Unnamespaced code

<?php
namespace MyProject {
const CONNECT_OK = 1;
class Connection { /* ... */ }
function connect() { /* ... */ }
}
namespace { // global code
session_start();
$a = MyProject\connect();
echo MyProject\Connection::start();
}

No PHP code may exist outside of the namespace brackets except for an opening declare statement.

src: http://php.net/manual/en/language.namespaces.definitionmultiple.php

• Kingshuk Deb: Probably you didnt read my post properly. I already tried that. That only works when you have it inside vendor folder.
• Nolwennig: Put the code in magento root, it's a bad practices
• Nolwennig: Declare multiple namespaces?