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<?
/* Produces browser-safe strings while preserving HTML tags.
* This function takes the string "ISTRING" as an argument and returns
* the string "OSTRING". All special characters from "ISTRING" are
* converted to browser-safe HTML codes using htmlentities(), and HTML
* tags are left intact and functional.
*/
// Contributed Nov 2000 by Jason Galvin: <www.jasongalvin.com>
function guardHTML($istring) {
$stringarr = preg_split('//', $istring);
$stringlen = count($stringarr);
for($i=0; $i<$stringlen; ++$i){
if($stringarr[$i] == "<"){
while($i<$stringlen){
$HTMLtag .= $stringarr[$i];
++$i;
if($stringarr[($i-1)] == ">") break;
}
--$i;
} else {
while($stringarr[$i] != "<" && $i<$stringlen){
$nonHTML .= $stringarr[$i];
++$i;
}
--$i;
}
$ostring .= $HTMLtag;
$HTMLtag = "";
$ostring .= htmlentities($nonHTML);
$nonHTML = "";
}
return $ostring;
}
?> |
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