note 83321 added to function.md5
| From: | Serge at osu1 dot php dot net | Date: | Tue, 20 May 2008 22:19:53 +0000 |
| Subject: | note 83321 added to function.md5 | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-139565@lists.php.net to get a copy of this message | ||
To convert an MD5 to 22 chars that contains only letters and numeric
<?php
define('HEX_CHARS', '0123456789abcdef');
define('BASE62_CHARS',
'0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ');
/*********************************************/
function ConvertFromArbitraryBase($Str, $Chars)
/*********************************************/
{
/*
Converts from an arbitrary-base string to a decimal string
*/
if (ereg('^[' . $Chars . ']+$', $Str))
{
$Result = '0';
for ($i=0; $i<strlen($Str); $i++)
{
if ($i != 0) $Result = bcmul($Result, strlen($Chars));
$Result = bcadd($Result, strpos($Chars, $Str[$i]));
}
return $Result;
}
return false;
}
/*******************************************/
function ConvertToArbitraryBase($Str, $Chars)
/*******************************************/
{
/*
Converts from a decimal string to an arbitrary-base string
*/
if (ereg('^[0-9]+$', $Str))
{
$Result = '';
do
{
$Result .= $Chars[bcmod($Str, strlen($Chars))];
$Str = bcdiv($Str, strlen($Chars));
}
while (bccomp($Str, '0') != 0);
return strrev($Result);
}
return false;
}
/**********************/
function CustomMD5($Str)
/**********************/
{
return ConvertToArbitraryBase(ConvertFromArbitraryBase(md5($Str), HEX_CHARS), BASE62_CHARS);
}
?>
----
Server IP: 82.80.248.162
Probable Submitter: 89.139.75.5
----
Manual Page -- http://www.php.net/manual/en/function.md5.php
Edit -- https://master.php.net/note/edit/83321
Del: integrated -- https://master.php.net/note/delete/83321/integrated
Del: useless -- https://master.php.net/note/delete/83321/useless
Del: bad code -- https://master.php.net/note/delete/83321/bad+code
Del: spam -- https://master.php.net/note/delete/83321/spam
Del: non-english -- https://master.php.net/note/delete/83321/non-english
Del: in docs -- https://master.php.net/note/delete/83321/in+docs
Del: other reasons-- https://master.php.net/note/delete/83321
Reject -- https://master.php.net/note/reject/83321
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