php text box toolbar

Just wondering if there is php code to use as an exampe that
allows very simple text formatting. That's not the right term,
I'll explain.

I want to have a text box in a form for a web page that has a
toolbar along the top of the textbox. The toolbar is similar to
many forums etc you see that has bold, italics, underline etc
buttons on it. If you highlight a word you've typed in the text
box and hit the bold button, <b> html tags are automatically
added each side of the selected text.

I'd also like it to be able to wrap <a href=""> tags around the
text. If text is selected, click the "link" toolbar button, a
popup appears where you paste the url, click ok and the <a
href="url"> tags are wrapped around the selected text.

It's not important that the text in the text box is displayed in
bold, I just want the html code inserted each side.

Hope that makes sense. I would have thought this is pretty
common for web forms, but I must be searching for the wrong
terms.

--
Troy Piggins | http://piggo.com/~troy
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