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<?php
// $document should contain an HTML document.
// This will remove HTML tags, javascript sections
// and white space. It will also convert some
// common HTML entities to their text equivalent.
$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 "xxx" with "chr(" and "yyy" with two backslashes as this site has problems otherwise
$replace = array ("",
"",
"\\1",
""",
"&",
"<",
">",
" ",
xxx161),
xxx162),
xxx163),
xxx169),
"xxxyyy1)");
$text = preg_replace($search, $replace, $document);
?>
learn more about some of the PHP functions used in this snippet: array, chr, copy, eval, preg_replace
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