Php foreach give 2 users random value

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You could do something like:

$oldcw = NULL;

foreach($users as $user) {
    if($oldcw){
        $newcw = $oldcw;
        $oldcw = NULL;
    }else{
        $newcw = mt_rand(1, 52);
        $oldcw = $newcw;
    }
    ....
}

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