如何使用js或jquery或php在文本区域中显示格式化的html内容？

For instance consider the following string:

<div><span class="author-advanced">hello <b>everyone</b></span></div>

It should print:

hello everyone

I'm using HTML5 editor. I've saved this string in mysql db and after retrieving it, I want to append it to text editor while keeping all formatting. What function/approach should be adopted to fix this?

If you are using <textarea> you need to put the HTML code inside the tag before initializing the editor. (in this case the <textarea> is converted to an <iframe>, that's the behavior of WYSIWYG editors using <textarea>)

<textarea class="editor"><span class="author-advanced">hello <b>everyone</b></span></textarea>

If the editor doesn't use a <textarea> then it use contenteditable="true" attribute to display formatted HTML.

<div class="editor" contenteditable="true"><span class="author-advanced">hello <b>everyone</b></span></div>

Suppose HTML5Editor() is a function to initialize the editor:

 $('.editor').HTML5Editor();

The HTML code must be inside the element before initializing the editor.