php sample using autoload

composer install

php index.php
./vendor/bin/phpunit

composer require monolog/monolog
composer require guzzlehttp/guzzle

1. open composer.json
2. edit like this

   {
       "autoload": {
           "psr-4": {
               "MyCompany\\MyApp\\": "app/"
               "MyCompany\\MyNewApp\\": "new_app/" // add this for class
           },
           "files": [
               "app/Support/helpers.php"  // for funtion
           ]
       }
   }
   

3. run this command

   composer dump-autoload
   

for more composer info, check https://packagist.org/