How can I make short random unique keys, like YouTube video IDs, in PHP? [closed]

Answer 1

Here is a small function that generates unique key randomly each time. It has very fewer chances to repeat same unique ID.

function uniqueKey($limit = 10) {

    $characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';

    $randstring = '';

    for ($i = 0; $i < $limit; $i++) {

        $randstring .= $characters[rand(0, strlen($characters))];
    }

    return $randstring;
}

source: http://guruquest.net/question/how-to-generate-random-unique-ids-like-youtube-or-tinyurl-in-php/