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Unique Number - Session Related


poolhustler86

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Hey People,

Hopefully someone can help point me in the right direction.

I require a unique number created by the rand fuction (perferable numbers) for each visitor who visits the website so i can store there shopping cart / quotation cart information within the database.

I would require to store the unique number created within the database in a table called unique_ids for the rand function to crosscheck that the number to a visitor is not one already exisiting on the system.

If it exisits to recreate a new number until it does not exisit....

Is there any easier way to create a unique id to store this info? Does the session id in php suppy different visitors a unique session onto the website?

Any suggestions / ideas would be most helpful...

Thankyou
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