HTMLArea 3.0 is now also working with Mozilla. An alpha version can be downloaded in the forum [1]. This post actually dates back to February of this year already. Posting to a test.php script is as simple as this:
01 <?php
02 /**
03 * Testing HTMLarea with PHP
04 */
05 $ta = $_REQUEST[\’ta\’];06
<html>
07 echo <<<EOF
08
09 <body>
10 <textarea style=\”width: 100%; height: 200px\”>$ta</textarea>
11 $ta
12 </body>
13 </html>
14 EOF;
15 ?>
[1] http://www.interactivetools.com/iforum/Open_Source_C3/htmlArea_v3.0_-_Alpha_Release_F14/