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Uniq random order number

Thread began 5/20/2020 8:31 am by Jonas | Last modified 5/21/2020 9:04 am by Ray Borduin | 127 views | 1 replies |


Uniq random order number

Can I use WebAssist to create a unique, random order number?
Today I have a code that automatically generates a random five-digit number:
function generateCode($limit){
$code = '';
for($i = 0; $i < $limit; $i++) { $code .= mt_rand(0, 9); }
return $code;
<input name="BokningRefnr" type="hidden" id="BokningRefnr" value="<?php echo generateCode(5) ?>">

And "BookingRefnr" is written to the database column: Booking.BookingRefnr which is INT 11, unique.

But I'm not sure what happens if the number generated doesn't happen to be unique. I suspect the form will not go through then - and the user will get a strange error message. Can I somehow verify that the number written to the database is unique - before it is written. And if not - a new number will automatically be generated.

Hope you understand what I mean.

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Ray BorduinWebAssist

I'd suggest adding a timestamp at the end, or using the session_id() value (alphanumeric, not numeric) to ensure it is unique. Testing the database in a loop is more work but possible if necessary.

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