PHP的二維碼產生函式庫

<?php   

    class QRbitstream {

        public $data = array();

        //----------------------------------------------------------------------

        public function size()

        {

            return count($this->data);

        }

        //----------------------------------------------------------------------

        public function allocate($setLength)

        {

            $this->data = array_fill(0, $setLength, 0);

            return 0;

        }

        //----------------------------------------------------------------------

        public static function newFromNum($bits, $num)

        {

            $bstream = new QRbitstream();

            $bstream->allocate($bits);

            $mask = 1 << ($bits - 1);

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

                if($num & $mask) {

                    $bstream->data[$i] = 1;

                } else {

                    $bstream->data[$i] = 0;

                }

                $mask = $mask >> 1;

            }

            return $bstream;

        }