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<?php

function mongo_id_from_time($yourTimestamp)
{
    static $inc = 0;

    $ts = pack('N', $yourTimestamp);
    $m = substr(md5(gethostname()), 0, 3);
    $pid = pack('n', posix_getpid());
    $trail = substr(pack('N', $inc++), 1, 3);

    $bin = sprintf("%s%s%s%s", $ts, $m, $pid, $trail);

    $id = '';
    for ($i = 0; $i < 12; $i++ ) {
        $id .= sprintf("%02X", ord($bin[$i]));
    }
    
    return new \MongoID($id);
}