PHP将字符串转成NCR编码
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function nochaoscode($encode, $str, $isemail = false) {
$output = '';
$str = iconv($encode, "UTF-16", $str);
for ($i = 0; $i < strlen($str); $i++,$i++) {
$code = ord($str{$i}) * 256 + ord($str{$i + 1});
if ($code < 128 and !$isemail) {
$output .= chr($code);
} else if ($code != 65279) {
$output .= "&#".$code.";";
}
}
return $output;
}