Questo puo' essere un punto di partenza.
Codice PHP:
<? ob_start() ?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Untitled</title>
</head>
<body>
<textarea name="ctl00$cphMain$txtTranslationResult" rows="6" cols="35" id="ctl00_cphMain_txtTranslationResult">
plutocaiowDFKqfdn
dfqsfdmlqsff;pmqsf^pqsfsfpqspf^qpsfpqpsfpq
</textarea>
</body>
</html>
<?php
$content = ob_get_contents();
ob_end_clean();
$search_regex = "|<textarea[^>]+>(.*)</textarea>|Umsi";
$result = preg_match($search_regex,$content,$match);
$match[1] = str_replace("","",$match[1]);
print $match[1];
//print $content;
?>