qrcode 生成验证码带文字

/**
 * 生成二维码
 *
 * @param int $id
 * @param string $file
 * @param boolean $is_download
 */
public function qrcode($id, $file = '', $is_download = false)
{
    //跳转地址
    $url = 'http://local.xxx.net/fgdgdgf';
    // 纠错级别：L、M、Q、H
    $errorCorrectionLevel = 'L';
    // 点的大小：1到10
    $matrixPointSize = 10;
    $qrcode = QRcode::png($url, false, $errorCorrectionLevel, $matrixPointSize, 2);

    //获取会议室信息和二维码code
    $room=$this->_meetingRoomServ->get($id);



    //创建背景,并将二维码贴到左边
    $bk = imagecreate(750, 470);
    imagecolorallocate($bk, 255, 255, 255);
    imagecopy($bk, $qrcode, 0, 0, 0, 0, 430, 430);

    //设置字体颜色
    $black = imagecolorallocate($bk, 0, 0, 0);

    // 字体
    $font = APP_PATH . "../www/YaHei.ttf";
    // 写入文字
    $arr = $this->mbstringtoarray($room['mr_address'],"utf-8");
    $mr_address=$this->_getstr($arr);
    // 会议室地点
    $arr_name = $this->mbstringtoarray($room['mr_name'],"utf-8");
    $mr_name=$this->_getstr($arr_name);
    // 区域
    $arr_mr_device = $this->mbstringtoarray($room['mr_device'],"utf-8");
    $mr_device=$this->_getstr($arr_mr_device,18);
    imagettftext($bk, 20, 0, 410, 40, $black, $font, $mr_name);
    imagettftext($bk, 12, 0, 410, 70, $black, $font, '会议室地点:' . $mr_address);
    imagettftext($bk, 12, 0, 410, 90, $black, $font, '会议室区域:' .$room['mr_area']);
    imagettftext($bk, 12, 0, 410, 150, $black, $font, '预订时间:' . $room['mr_timestart'] . '-' . $room['mr_timeend']);
    imagettftext($bk, 12, 0, 410, 190, $black, $font, '容纳人数:' . $room['mr_galleryful']);
    imagettftext($bk, 12, 0, 410, 240, $black, $font, '可用设备:' .$mr_device);


    if ($file) {
        //生成文件
        imagepng($bk, $file);
    } else if ($is_download) {
        //直接下载
        Header("Content-type: application/octet-stream");
        Header("Accept-Ranges: bytes");
        Header("Accept-Length:6000");
        Header("Content-Disposition: attachment; filename={$room['mr_address']}-{$room['mr_name']}.png");
        imagepng($bk);
    } else {
        //直接输出图片
        header('Content-Type: image/png');
        imagepng($bk);

    }
}

/**
 * 将字符拆份成段
 * @param $str
 * @param $charset
 * @return array
 */
protected  function mbstringtoarray($str,$charset) {
    $array=array();
    $strlen=mb_strlen($str);
    while($strlen){
        $array[]=mb_substr($str,0,1,$charset);
        $str=mb_substr($str,1,$strlen,$charset);
        $strlen=mb_strlen($str);
    }
    return $array;
}
/**
 * 拼接超出字符串
 * @param $arr
 * @return string
 */
protected function _getstr($arr,$leng=10){
    $temp='';

    for($i=0;$i<count($arr);$i++)
    {
        if($i%$leng==0&&$i>0)
        {
            $temp=$temp."\n";
        }
        $temp=$temp.$arr[$i];
    }
    return $temp;
}

引入qrcode文件就可以生成如下的二维码图片

注意：$font这里字体文件路径要使用绝对路径，不能使用相对路径，否则右边的字会出不来。