请问以下程序错在那里!!
$search = array ("<script[^>]*?>.*?</script>si", // strip out javascript
"<[\/\!]*?[^<>]*?>si", // strip out html tags
"([\r\n])[\s]+", // strip out white space
"&(quot|#34);i", // replace html entities
"&(amp|#38);i",
"&(lt|#60);i",
"&(gt|#62);i",
"&(nbsp|#160);i",
"&(iexcl|#161);i",
"&(cent|#162);i",
"&(pound|#163);i",
"&(copy|#169);i",
"&#(\d+);e"); // evaluate as php
$replace = array ("",
"",
"\\1",
"\"",
"&",
"<",
">",
" ",
chr(161),
chr(162),
chr(163),
chr(169),
"chr(\\1)");
$document="<body>";
$text = preg_replace ($search, $replace, $document);
echo $text;
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