note 53780 added to function.rand
| From: | php-general at lists dot php dot net | Date: | Mon, 13 Jun 2005 09:52:13 +0000 |
| Subject: | note 53780 added to function.rand | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-90344@lists.php.net to get a copy of this message | ||
To generate a string of unique characters this works for me.
$keychars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
$length = 32;
$randkey = array();
$max=strlen($keychars)-1;
if($length>$max)
die("infinate loop");
for ($i=0;$i<=$length;$i++)
{
$newChar=substr($keychars, rand(0, $max), 1);
if(!in_array("$newChar",$randkey))
$randkey[]= "$newChar";
else
$i=count($randkey);
}
echo implode($randkey);
----
Manual Page -- http://www.php.net/manual/en/function.rand.php
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