vb.org Archive - Random Number, if duplicate?

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- vB3 Programming Discussions (https://vborg.vbsupport.ru/forumdisplay.php?f=15)

- - Random Number, if duplicate? (https://vborg.vbsupport.ru/showthread.php?t=107564)

Red Blaze

02-09-2006 06:45 PM

Random Number, if duplicate?

Code:

<?php

srand ((double) microtime( )*1000000);

$random_number = rand( );

echo "$random_number";

?>

I want to use this random code generator, to store in the database a code. I want this number to be unique. How can I keep PHP from duplicating a code saved in the database?

I can tell MySQL to keep it unique, but I don't want an error page. I want to keep errors to a minimum. Thank you for the help.

I was thinking of a loop to check if it exists until it finds a unique number and end the loop before it spits out the page with the code in a hidden field. I just don't know what codes to use. >_<

Marco van Herwaarden

02-09-2006 06:51 PM

What are you trying to do with this?

Red Blaze

02-09-2006 06:55 PM

Well, I want this for a gallery. When someone makes an album, the random number generator would create a number. The user would have to keep this to go back to view the album. Kind of like a passcode... key kinda thing.

Guest190829

02-09-2006 07:00 PM

Why not just use mysql's auto_increment attribute, which adds a unique identifer to table rows?

Red Blaze

02-09-2006 07:03 PM

Well, I don't want single digit keys. Otherwise, random people will just type 1, 2, 3, 4, 5...and have access where they're not suppose to be.

Marco van Herwaarden

02-09-2006 07:07 PM

So you want to make it that anybody that want to view an album needs a password? Or just the original owner of the album when they want to edit it?

Red Blaze

02-09-2006 07:10 PM

If the users types in the correct passcode, they can view the album.

Marco van Herwaarden

02-09-2006 07:16 PM

And how will they get that password?

Wouldn't it be easiest if you let the user who creates the album just let choose a password?

Red Blaze

02-09-2006 07:19 PM

It would be emailed to them.
lol I have it figured out. I just want to know how to keep it from duplicating; if it ever happend.

Paul M

02-09-2006 07:21 PM

Why does it matter if you happen to get a duplicate ?

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