Group matching and unique array elements (PHP)

[Lazarus99]

I have an array in php

bobby, kevin, bill, kevin, brian, bobby, bobby

I am trying to anonymise these into a new array.

bidder1, bidder2, bidder3, bidder2, bidder4, bidder1, bidder1

I have tried searching the array and try to keep track of the key then piece it back together but I know there is an easier way.

Thanks in advance

[requinix]

What code have you tried so far?

[Lazarus99]

To be honest with you it was a complete mess

[Barand]

Here's one method

$bidders = ['bobby', 'kevin', 'bill', 'kevin', 'brian', 'bobby', 'bobby' ];
$uniq = array_unique($bidders);
for ($i=1; $i<=count($uniq); $i++) {
    $anon[] = "Bidder$i";
}
$trans = array_combine($uniq, $anon);
$anonBidders = array_map( function($v) use ($trans) {
                              return $trans[$v];
                          }, 
                          $bidders );

to test

echo '<pre>';
vprintf("Bidders     | %-8s | %-8s | %-8s | %-8s | %-8s | %-8s | %-8s <br>", $bidders);
vprintf("anonBidders | %-8s | %-8s | %-8s | %-8s | %-8s | %-8s | %-8s <br>", $anonBidders);

giving

Bidders     | bobby    | kevin    | bill     | kevin    | brian    | bobby    | bobby    
anonBidders | Bidder1  | Bidder2  | Bidder3  | Bidder2  | Bidder4  | Bidder1  | Bidder1  

 

[Lazarus99]

Perfect, Thank you very much, that worked great for me.