note 125039 added to function.str-shuffle
| From: | wmtrader at yandex dot ru | Date: | Sat, 23 May 2020 08:33:11 +0000 |
| Subject: | note 125039 added to function.str-shuffle | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-214666@lists.php.net to get a copy of this message | ||
Unshuffle, using:
<?php
$string = "Hello World!";
$seed = 1234567890;
mt_srand($seed);
echo $sh = str_shuffle($string); //print 'eloWHl rodl!'
echo str_unshuffle($sh, $seed); //print 'Hello World!'
?>
<?php
function str_unshuffle($str, $seed){
$unique = implode(array_map('chr',range(0,254)));
$none = chr(255);
$slen = strlen($str);
$c = intval(ceil($slen/255));
$r = '';
for($i=0; $i<$c; $i++){
$aaa = str_repeat($none, $i*255);
$bbb = (($i+1)<$c) ? $unique : substr($unique, 0, $slen%255);
$ccc = (($i+1)<$c) ? str_repeat($none, strlen($str)-($i+1)*255) : "";
$tmp = $aaa.$bbb.$ccc;
mt_srand($seed);
$sh = str_shuffle($tmp);
for($j=0; $j<strlen($bbb); $j++){
$r .= $str{strpos($sh, $unique{$j})};
}
}
return $r;
}
----
Server IP: 45.112.84.4
Probable Submitter: 103.51.166.36 (proxied: 46.61.2.223)
----
Manual Page -- http://php.net/manual/en/function.str-shuffle.php
Edit -- https://master.php.net/note/edit/125039
Del: integrated -- https://master.php.net/note/delete/125039/integrated
Del: useless -- https://master.php.net/note/delete/125039/useless
Del: bad code -- https://master.php.net/note/delete/125039/bad+code
Del: spam -- https://master.php.net/note/delete/125039/spam
Del: non-english -- https://master.php.net/note/delete/125039/non-english
Del: in docs -- https://master.php.net/note/delete/125039/in+docs
Del: other reasons-- https://master.php.net/note/delete/125039
Reject -- https://master.php.net/note/reject/125039
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