Very useful link for ckeditor5 integration into your website. Indeed, i was looking for this option from many days. And, finally I was able to make this now.

Upload image in CKEditor 5 and save data into database using PHP - techareatutorials.com

How to upload image and save data into mysql database using PHP. CKEditor is a WYSIWYG rich text editor which enables writing content directly inside of web pages or online applications.