function GenerateID ()
{
$len = 3;
$base='ABCDEFGHKLMNOPQRSTWXYZ';
$max=strlen($base)-1;
$activatecode='';
mt_srand((double)microtime()*1000000);
while (strlen($activatecode)<$len+1)$activatecode.=$base{mt_rand(0,$max)};
$len = 7;
$base='1234567890';
$max=strlen($base)-1;
mt_srand((double)microtime()*1000000);
while (strlen($activatecode)<$len+1) $activatecode.=$base{mt_rand(0,$max)};
return $activatecode;
}
this will generate and ID of 4 letters and 4 digits based on the current
time stamp..
ex: *QCKS9046 ...* the possibility of generating the same ID again is almost
0... (and you can make it even less if you increase the length)...
PS: I don't take credit for the code as it is a modified version of a code I
found long time back (this same code is running on one of my applications
for months without any problem)..
Regards,
Rabih G. Tayyem
On 3/21/07, ccspencer@xxxxxxxxxxxx <ccspencer@xxxxxxxxxxxx> wrote:
Hello,
I want to add a random unique ID to a Mysql table. Collisions
are unlikely but possible so to handle those cases I'd like to
regenerate the random ID until there is no collision and only
then add my row. Any suggestions for a newbie as to the right
way to go about doing this?
Best,
Craig
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