XML parsing error: undefined entity

When I opened the XML generated by PHP, I ran into this error: XML parsing error: undefined entity Location: http://www.mousebomb/Manage/xml.php?act=staticText&name=about Line: 1, Column: 84:

HI, hello! I’m Mousebomb, born in the ‘80s, Year of the Dragon, Aquarius. A typical net junkie and workaholic…… currently unemployed.
———————————————————————————–^ The reason is simple: HTML escapes like … can’t appear directly inside an XML node — just add CDATA and it’s fine. echo “”;