CK Editor CDN
<script src="https://cdn.ckeditor.com/4.16.2/standard/ckeditor.js"></script>
Arfaouim
<script src="https://cdn.ckeditor.com/4.16.2/standard/ckeditor.js"></script>
<script src="https://cdn.ckeditor.com/ckeditor5/23.1.0/classic/ckeditor.js"></script>
<script src="https://cdn.ckeditor.com/4.14.0/standard/ckeditor.js"></script>
<script src="https://cdn.ckeditor.com/4.16.1/standard/ckeditor.js"></script>