The xoops module.textsanitizer.php is really fantastic script but buggy. some known items:

 function codePreConv, codeConv: the pair of functions handling

by base64_encode and base64_decode. This can be a solution but can not deal with recursive

 function &undoHtmlSpecialChars(&$text),  function &htmlSpecialChars($text):&nbsp is converted to   in htmlSpecialChars but not converted back in undoHtmlSpecialChars, which took long time to debug quote […]

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Ò»¸öÖÐÐÄ:  kernel/object.php

Á½¸ö»ù±¾µã: module.textsanitizer.php, mysqldatabase.php