In textarea, I load text from database and then show in textarea. I have a problem, textarea not show < and >. It has been changed to
You may also want to use the Entity Number. It depends on the page character set. For ISO-8859-1 you would do "<(semicolon)" and ">(semicolon)". replace the "(semicolon)" part with ; ... This just shows that this page supports it too :)
For a complete list view HTML ISO-8859-1 Reference
Escape the & by using &.
Change this:
<textarea><html></textarea>
To this:
<textarea>&lt;html&gt;</textarea>
If you're using PHP you can automatically do this with htmlspecialchars().