Php codeigniter中的QR码生成

此代码适用于本地主机，但不适用于服务器：

public function user_generate_qr($u_id){

    $user_qr = $this->admin_model->get_user_data($u_id);
    $this->load->library('ciqrcode');

    $params['data'] = str_replace(" ","_",$user_qr['u_name']).'_'.$user_qr['u_dob'].'_'.$user_qr['u_gender'].'_'.$user_qr['u_email'].'_'.$user_qr['u_address'].'_'.$user_qr['u_mobile'].'_'.$user_qr['u_pincode'].'_'.$user_qr['user_code'].'_'.$user_qr['ref_code'];
    $params['level'] = 'H';
    $params['size'] = 20;
    $params['savename'] = QRPATH.'\a_'.str_replace(" ","_",$user_qr['u_name'].'_'.$user_qr['u_id'].'.png');
    $this->ciqrcode->generate($params);

    $this->load->helper('download');
    $data = file_get_contents(base_url().'public_html/qr_code/a_'.str_replace(" ","_",$user_qr['u_name'].'_'.$user_qr['u_id'].'.png'));
    $name = 'a_'.str_replace(" ","_",$user_qr['u_name'].'_'.$user_qr['u_id'].'.png');
    force_download($name, $data);

   // redirect("admin_ctrl/index");

    // echo '<img src="'.base_url().'public_html/qr_code/a'.$this->user['u_name'].'.png" />';

}

公共功能用户\u生成\u qr（$u\u id）{
$user\u qr=$this->admin\u model->get\u user\u data（$u\u id）；
$this->load->library（'ciqrcode'）；
$params['data']=str_replace（“，”uu“，$user_qr['u_name']）。'''.$user_qr['u dob'.''.'.'.$user_qr['u性别].''.$user_qr['u email'.''.$user_qr['u地址'.'.''.'.$user_qr['u手机'.'.'.'.'.'''.$user_qr['u码].'.'.'.$user_码['u码].'.'.'.$user_码].['u码'.'.'.'''.''''''''''''.'''.'''''''''''''.'u码'.''.'；
$params['level']='H'；
$params['size']=20；
$params['savename']=QRPATH.\a_'.str_replace（“，”，$user_qr['u_name']。'.''.$user_qr['u_id'..png'）；
$this->ciqrcode->generate（$params）；
$this->load->helper（'download'）；
$data=file_get_contents（base_url（）.'public_html/qr_code/a_'.str_replace（“，”，$user_qr['u_name'].'''.''.$user_qr['u_id'..png'）；
$name='a_'.str_replace（“，”，$user_qr['u_name'].''.''.$user_qr['u_id'..png'）；
强制下载（$name$data）；
//重定向（“管理控制/索引”）；
//echo“user['u_name'..”.png“/>”；
}

将所有文件复制到库中，然后写入此coed

$this->load->library('ciqrcode');
header("Content-Type: image/png");
$params['data'] = 'This is a text to encode become QR Code';
$this->ciqrcode->generate($params);

---

将所有文件复制到库中，然后写入此coed

$this->load->library('ciqrcode');
header("Content-Type: image/png");
$params['data'] = 'This is a text to encode become QR Code';
$this->ciqrcode->generate($params);

---

您的错误消息是什么？请指定。无法打开流：HTTP请求失败！HTTP/1.1 404未找到。当您执行此功能时，正在您的“public\u html/qr\u code/文件夹中生成qrcode。单击按钮转到此功能。然后它生成qrcode并从public\u html/qr\u code/“saved name.png”下载“指定的错误消息是什么。无法打开流：HTTP请求失败！HTTP/1.1 404未找到当您执行此功能时，您的“public_html/qr_code/文件夹”中正在生成qr码单击按钮转到此功能。然后生成qrcode并从public_html/qr_code/“saved name.png”下载