note 112097 added to function.idn-to-utf8
| From: | kushik.com | Date: | Thu, 02 May 2013 13:36:20 +0000 |
| Subject: | note 112097 added to function.idn-to-utf8 | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-194689@lists.php.net to get a copy of this message | ||
<?php
// for those who has PHP older than version 5.3
class IDN {
// adapt bias for punycode algorithm
private static function punyAdapt(
$delta,
$numpoints,
$firsttime
) {
$delta = $firsttime ? $delta / 700 : $delta / 2;
$delta += $delta / $numpoints;
for ($k = 0; $delta > 455; $k += 36)
$delta = intval($delta / 35);
return $k + (36 * $delta) / ($delta + 38);
}
// translate character to punycode number
private static function decodeDigit($cp) {
$cp = strtolower($cp);
if ($cp >= 'a' && $cp <= 'z')
return ord($cp) - ord('a');
elseif ($cp >= '0' && $cp <= '9')
return ord($cp) - ord('0')+26;
}
// make utf8 string from unicode codepoint number
private static function utf8($cp) {
if ($cp < 128) return chr($cp);
if ($cp < 2048)
return chr(192+($cp >> 6)).chr(128+($cp & 63));
if ($cp < 65536) return
chr(224+($cp >> 12)).
chr(128+(($cp >> 6) & 63)).
chr(128+($cp & 63));
if ($cp < 2097152) return
chr(240+($cp >> 18)).
chr(128+(($cp >> 12) & 63)).
chr(128+(($cp >> 6) & 63)).
chr(128+($cp & 63));
// it should never get here
}
// main decoding function
private static function decodePart($input) {
if (substr($input,0,4) != "xn--") // prefix check...
return $input;
$input = substr($input,4); // discard prefix
$a = explode("-",$input);
if (count($a) > 1) {
$input = str_split(array_pop($a));
$output = str_split(implode("-",$a));
} else {
$output = array();
$input = str_split($input);
}
$n = 128; $i = 0; $bias = 72; // init punycode vars
while (!empty($input)) {
$oldi = $i;
$w = 1;
for ($k = 36;;$k += 36) {
$digit = IDN::decodeDigit(array_shift($input));
$i += $digit * $w;
if ($k <= $bias) $t = 1;
elseif ($k >= $bias + 26) $t = 26;
else $t = $k - $bias;
if ($digit < $t) break;
$w *= intval(36 - $t);
}
$bias = IDN::punyAdapt(
$i-$oldi,
count($output)+1,
$oldi == 0
);
$n += intval($i / (count($output) + 1));
$i %= count($output) + 1;
array_splice($output,$i,0,array(IDN::utf8($n)));
$i++;
}
return implode("",$output);
}
public static function decodeIDN($name) {
// split it, parse it and put it back together
return
implode(
".",
array_map("IDN::decodePart",explode(".",$name))
);
}
}
echo IDN::decodeIDN($_SERVER['HTTP_HOST']);
?>
----
Server IP: 69.147.83.199
Probable Submitter: 212.183.128.67
----
Manual Page -- http://php.net/manual/en/function.idn-to-utf8.php
Edit -- https://master.php.net/note/edit/112097
Del: integrated -- https://master.php.net/note/delete/112097/integrated
Del: useless -- https://master.php.net/note/delete/112097/useless
Del: bad code -- https://master.php.net/note/delete/112097/bad+code
Del: spam -- https://master.php.net/note/delete/112097/spam
Del: non-english -- https://master.php.net/note/delete/112097/non-english
Del: in docs -- https://master.php.net/note/delete/112097/in+docs
Del: other reasons-- https://master.php.net/note/delete/112097
Reject -- https://master.php.net/note/reject/112097
Search -- https://master.php.net/manage/user-notes.php