How to Allow Iframe on TinyMCE WYSIWYG editor
TinyMCE is a good wysiwyg text editor which you can on your site by free. It is also used as additional module on some CMS like drupal. However (bacause of security problem) this wysiwyg editor lack of iframe button. You also can't insert iframe code, even you insert in html area. TinyMCE will remove any iframe code on your editor. Don't worry, by default TinyMCE doesn't allow iframe but it still support iframe. You just need add some code on your site.