.. _Environment-getPsr4Prefixes:

==============================================
Environment::getPsr4Prefixes()
==============================================

\\nn\\t3::Environment()->getPsr4Prefixes();
----------------------------------------------

Return list of PSR4 prefixes.

This is an array with all folders that must be parsed by class when autoloading / bootstrapping TYPO3
have to be parsed. In a TYPO3 extension, this is the ``Classes`` folder by default.
The list is generated by Composer/TYPO3.

An array is returned. Key is ``Vendor\Namespace\``, Value is an array with paths to the folders,
which are searched recursively for classes. It does not matter whether TYPO3 is running in composer
mode or not.

.. code-block:: php

	\nn\t3::Environment()->getPsr4Prefixes();

Example for return:

.. code-block:: php

	[
	    'Nng\Nnhelpers\' => ['/path/to/composer/../../public/typo3conf/ext/nnhelpers/Classes', ...],
	    'Nng\Nnrestapi\' => ['/path/to/composer/../../public/typo3conf/ext/nnrestapi/Classes', ...]
	]

| ``@return array``

Source Code
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: php

   
   public function getPsr4Prefixes() {
   	$composerClassLoader = ClassLoadingInformation::getClassLoader();
   	$psr4prefixes = $composerClassLoader->getPrefixesPsr4();
   	return $psr4prefixes;
   }