Create Custom Helper Laravel 5.*

1. create file in app\Http directory ex: helpers.php
2. then fill this code into helpers.php file

<?php
function convertExample($param)
{
     // create your logic here
      return $value
}

3. add/modify your file composer.json in autoload section to this below code

"files": [
            "app/Http/helpers.php"
        ]

4. run composer dump-autoload