Clean server side solution for summernote WYSIWYG editor image uploading

summernote_WYSIWYG_editor_serverside_handling_image_upload.php

<?php
/*
 * Based on this blog post: https://www.codewall.co.uk/install-summernote-with-laravel-tutorial/
 * here is my solution for the summernote editor image upload.
 * Notes :
 ***** Do not forget enctype="multipart/form-data" attribute in your form ;)
 ***** Use unscaped blade syntax {!! $data !!} to render the results
 ***** Make sure you read laravel 5.8 Storage Documentation here : https://laravel.com/docs/5.8/filesystem#the-public-disk
 ***** For Simplicity I used clusures, means that this is originally **routes/web.php** file!
 
 ***** UTF-8 is supported according to this: https://gist.github.com/Xeoncross/9401853#gistcomment-1300643
*/
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Storage;

Route::get('/your-route-to-editor', function () {
    return view('your-view');
});

Route::post('/your-route-to-processor', function (Request $request) {

       $this->validate($request, [
           'editordata' => 'required',
       ]);

       $data = $request->input('editordata');

       //loading the html data from the summernote editor and select the img tags from it
       $dom = new DOMDocument('1.0', 'UTF-8');
       $dom->loadHtml(mb_convert_encoding($data, 'HTML-ENTITIES', 'UTF-8'), LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD);    
       $images = $dom->getElementsByTagName('img');
       
       foreach($images as $k => $img){
           //for now src attribute contains image encrypted data in a nonsence string
           $data = $img->getAttribute('src');
           //getting the original file name that is in data-filename attribute of img
           $file_name = $img->getAttribute('data-filename');
           //extracting the original file name and extension
           $arr = explode('.', $file_name);
           $upload_base_directory = 'public/';

           $original_file_name='time()'.$k;
           $original_file_extension='png';

           if (sizeof($arr) ==  2) {
           		$original_file_name = $arr[0];
           		$original_file_extension = $arr[1];
			//file name validations?
           }
           else
           {
           		//the file name contains extra . in itself
           		$original_file_name = implode("_",array_slice($arr,0,sizeof($arr)-1));
           		$original_file_extension = $arr[sizeof($arr)-1];
           }

           list($type, $data) = explode(';', $data);
           list(, $data)      = explode(',', $data);

           $data = base64_decode($data);

           $path = $upload_base_directory.$original_file_name.'.'.$original_file_extension;

           //uploading the image to an actual file on the server and get the url to it to update the src attribute of images
           Storage::put($path, $data);

           $img->removeAttribute('src');       
           //you can remove the data-filename attribute here too if you want.
           $img->setAttribute('src', Storage::url($path));
           // data base stuff here :
       	   //saving the attachments path in an array
       }

       //updating the summernote WYSIWYG markdown output.
       $data = $dom->saveHTML($doc->documentElement);

       // data base stuff here :
       // save the post along with it attachments array
	   return view('your-preview-page')->with(['data'=>$data]);

});