如何使用 codeigniter 使用 blob？

Question

我目前正在使用 codeigniter 创建一个程序，我想在其中上传图像并将其作为 blob 保存到数据库。问题是当我尝试上传图片时，我收到了这个错误

The path to the image is not correct.

Your server does not support the GD function required to process this type of image.

这是我在控制器中的代码：

public function do_upload() {
    if($this->session->userdata('logged_in')) {
        //print_r($_FILES);            
        $config = array(
            'upload_path'   => './public/img/uploads',
            'upload_url'    => base_url().'public/img/uploads',
            'allowed_types' => 'gif|jpg|png|jpeg',
            //'overwrite'     => TRUE,
            'max_size'      => '1000KB',
            'max_width'     => '1024',
            'max_height'    => '768',
            //'encrypt_name'  => true,
        );

        $this->load->library('upload', $config);

        //for($i=0; $i<count($_FILES['userfile']['name']); $i++) {
        if (!$this->upload->do_upload()) {
            $error = array('error' => $this->upload->display_errors());
            $this->load->view('v_page/header_view');
            $this->load->view('v_document/upload_error', $error);
            $data['folderName'] = $this->dropdown->get_folder_details();
            $data['departmentName'] = $this->dropdown->get_department_details();
            $this->load->view('v_document/upload_view', $data);
            $this->load->view('v_page/footer_view');
        } 
        else {
            $upload_data = $this->upload->data();
            $this->_createThumbnail($upload_data['file_name']);
            $data['thumbnail_name'] = $upload_data['raw_name']. '_thumb' .$upload_data['file_ext'];
            $file_array = array(
                'image'         => "",
                'image_name'    => $upload_data['file_name'],
                //'description'   => "",
                'date_created'  => date('Y-m-d H:i:s', now()),
                'date_modified' => date('Y-m-d H:i:s', now()),
                'size'          => $upload_data['file_size'],
                'type'          => $upload_data['image_type'],
                'width'         => $upload_data['image_width'],
                'height'        => $upload_data['image_height'],
            );
            $this->load->database();
            $this->db->insert('tbl_image', $file_array);
            $data = array('upload_data' => $this->upload->data());
            $this->load->view('v_document/upload_success', $data);
        }     
        //}
    }
    else {
        redirect('login', 'refresh');
    }
}

public function _createThumbnail($filename) {
    $config['image_library']    = "gd2";      
    $config['source_image']     = "uploads/" .$filename;      
    $config['create_thumb']     = TRUE;      
    $config['maintain_ratio']   = TRUE;      
    $config['width'] = "80";      
    $config['height'] = "80";
    $this->load->library('image_lib',$config);
    if(!$this->image_lib->resize()) {
        echo $this->image_lib->display_errors();
    }
}  

图片已成功上传，但 blob 无效。

Answer 1

试试下面的建议：

更改自：

$config['source_image'] = "uploads/" .$filename;

收件人：
$config['source_image'] = "./uploads/" .$filename;