Random password 8-12 character unique alpha-numeric code

Posted on 2009-04-05
Last Modified: 2013-12-12
I want to generate random password 8 - 12 character unique alpha-numeric code. How do I proceed with correct random unique ?
Question by:Loganathan Natarajan
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Accepted Solution

striker46 earned 250 total points
ID: 24075008
This is just a simple idea I've seen used in some sites.

Gets current timestamp, md5's it and gets the number of characters you desire from the beginning of the resulting string.

There are better ways to achieve the results but this one is fairly good and simple. Chances that a unique password is generated twice are extremely low because MD5 is always completely different for each timestamp.

$chars = 8;
$pwd = md5(time());
$rest = substr($pwd, 0, $chars - 1);
echo $pwd;

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Expert Comment

ID: 24075010
Wrong variable name. Again:

$chars = 8;
$pwd = md5(time());
$pwd= substr($pwd, 0, $chars - 1);
echo $pwd;

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LVL 36

Author Closing Comment

by:Loganathan Natarajan
ID: 31566918

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