PHP make all possible variants of 4char A-Z,a-z,0-9

Posted by Mike on Stack Overflow See other posts from Stack Overflow or by Mike
Published on 2011-01-17T13:50:17Z Indexed on 2011/01/17 13:53 UTC
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I have to make a list of all possible permurations of 4characters A-Z,a-z,0-9 and conbination of all this.How can i pass thru all of the possible combinations and printf them ?

what's it for:I need to make this in a html document that i can then print and give all this as random unique usernames for our university, so that students can provide feedback based on one unique id that will be invalidated when used. i can not change this procedure into a better one!

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