使用codeigniter

Question

我有一个脚本添加乐队名称+乐队的图片。这是我的控制者：

public function addBand()
{
    $config['upload_path']   = './uploads/bands';
    $config['allowed_types'] = 'gif|jpg|png';
    $config['encrypt_name'] = TRUE;
    $this->load->library('upload', $config);

    if ( ! $this->upload->do_upload('picture')) {
        $error = array('error' => $this->upload->display_errors());
        $this->session->set_flashdata('error', $error);
        $this->load->view('concerts/index');
    }

    else {

        $upload_data = $this->upload->data();
        $file_name = $upload_data['file_name'];

        $data = array(
            'bName' => $this->input->post('name'),
            'bPicture' => $file_name
        );

        $this->band_model->insertBand($data);
        $this->session->set_flashdata('success', "Groupe ajouté");
        redirect('');
    }
}

这个控制器工作得很好！所以。现在我在jquery中添加Cropper插件。我得到“＃imagebase64”的价值，他给我的结果很好。之后，我把代码从这个数据64创建图片。他工作得很好。现在我想用Codeigniter添加这个代码..它不起作用：

public function addBand()
{
    $config['upload_path']   = './uploads/bands';
    $config['allowed_types'] = 'gif|jpg|png';
    $config['encrypt_name'] = TRUE;
    $this->load->library('upload', $config);

    $img64 = $this->input->post('imagebase64');
    $exploded = explode(',', $img64, 2);
    $encoded = $exploded[1];
    $decoded = base64_decode($encoded);
    $img_handler = imagecreatefromstring($decoded);
    $finalImg = imagepng($img_handler, "png.png");

    if ( ! $this->upload->do_upload('picture')) {
        $error = array('error' => $this->upload->display_errors());
        $this->session->set_flashdata('error', $error);
        $this->load->view('concerts/index');
    }

    else {

        $finalImg = $this->upload->data();
        $file_name = $finalImg['file_name'];

        $data = array(
            'bName' => $this->input->post('name'),
            'bPicture' => $file_name
        );

        $this->band_model->insertBand($data);
        $this->session->set_flashdata('success', "Groupe ajouté");
        redirect('');
    }
}

当我在“$ finalImg = $ this-＆gt; upload-＆gt; data（）;”之前制作$ finalImg juste的var_dump时，我有“boolean：1”，当我在 $ file_name = $ finalImg ['file_name']之后创建var_dump juste; 我有：

'file_name' => string 'eca69e25e70c469e73a5bfa114c5a87d.png' (length=36)
  'file_type' => string 'image/png' (length=9)
  'file_path' => string 'C:/wamp64/www/concerts/uploads/bands/' (length=37)
  'full_path' => string 'C:/wamp64/www/concerts/uploads/bands/eca69e25e70c469e73a5bfa114c5a87d.png' (length=73)
  'raw_name' => string 'eca69e25e70c469e73a5bfa114c5a87d' (length=32)
  'orig_name' => string 'Sans_titre-1.png' (length=16)
  'client_name' => string 'Sans titre-1.png' (length=16)
  'file_ext' => string '.png' (length=4)
  'file_size' => float 368.2
  'is_image' => boolean true
  'image_width' => int 784
  'image_height' => int 419
  'image_type' => string 'png' (length=3)
  'image_size_str' => string 'width="784" height="419"' (length=24)

那么，我如何在PHP中生成图片并使用codeigniter上传此图片？谢谢！