CodeIgniter helper functions

custom_helper.php

<?php   if (!defined('BASEPATH')) { exit; }

if (!function_exists('generate_uuid')) {
    /**
     * Generate a universally unique ID that can be used for sharding.
     *
     * @param integer $shard_id The ID to shard by.
     * @param integer $seq Incrementing sequence for the database table.
     * @return string Universally unique ID.
     */
    function generate_uuid($shard_id=0, $seq=0) {
        return floor((microtime(TRUE) * 1000) - APP_EPOCH_MS) << 23 |
                ($shard_id % APP_NUM_SHARDS) << 10 |
                ($seq % 1024);
    }
}
/* End of file custom_helper.php */
/* Location: ./application/helpers/custom_helper.php */