Php 如何使用CodeIgniter将图像保存在文件夹中？

我是CodeIgniter的新手。我想知道如何在文件夹中保存图像。但我编写的代码类似于存储在表中的图像名称。但我想将图像存储在一个文件夹中，并从该文件夹中检索图像。在这里，我使用代码将图像名称存储在表中：

在控制器中：

public function product()
{
    $this->load->library('form_validation');
    $this->form_validation->set_rules('productname','Product Code','trim|required');
    $this->form_validation->set_rules('productcode','Product Code','trim|required');
    $this->form_validation->set_rules('productprice','Product Price','trim|required');
    $this->form_validation->set_rules('quantity','Quantity','trim|required');
    $this->form_validation->set_rules('uploadimage','Upload Image','trim_rquired');
    if($this->form_validation->run()==FALSE)
    {
        $this->index();
    }else
        {
            $data['query']=$this->main_model->product_db();
            $this->load->view('query_view',$data);
        }
}

在模型中：

public function product_db()
{
    $data=array(
    'productname'=>$this->input->post('productname'),
    'productcode'=>$this->input->post('productcode'),
    'productprice'=>$this->input->post('productprice'),
    'quantity'=>$this->input->post('quantity'),
    'image'=>$this->input->post('uploadimage')
        );
        $query=$this->db->get("product");
        if($query->num_rows())
        {
        $this->db->insert('product',$data);
        
        $query=$this->db->get("product");
        $this->session->set_userdata($data);
        return $query->result();
        
    } 
return false;
 }

视图：（表单页）

产品名称：
您正在寻找这种代码

$config['upload_path'] = './files'; //core folder (if you like upload to application folder use APPPATH)
$config['allowed_types'] = 'gif|jpg|png'; //allowed MIME types
$config['encrypt_name'] = TRUE; //creates uniuque filename this is mainly for security reason

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

if (!$this->upload->do_upload('picture_upload')) { //picture_upload is upload field name set in HTML eg. name="upload_field"
    $error = array('error' => $this->upload->display_errors());
}else{
    //print_r($this->upload->data()); // this is array of uploaded file consist of filename, filepath etc. print it out
    $this->upload->data()['file_name']; // this is how you get for example "file name" of file
}

请按照这本指南去做，里面什么都有。如果你需要逻辑方面的帮助，那很简单

表单->上传字段->按钮->表单发送->检查文件是否正常->上传文件->在表中保存数据（文件名、文件路径…）。
这只是上传图像的示例代码：

<?php
    $configUpload['upload_path']    = './uploads/';                 #the folder placed in the root of project
    $configUpload['allowed_types']  = 'gif|jpg|png|bmp|jpeg';       #allowed types description
    $configUpload['max_size']       = '0';                          #max size
    $configUpload['max_width']      = '0';                          #max width
    $configUpload['max_height']     = '0';                          #max height
    $configUpload['encrypt_name']   = true;                         #encrypt name of the uploaded file
    $this->load->library('upload', $configUpload);                  #init the upload class
    if(!$this->upload->do_upload('uploadimage')){
        $uploadedDetails    = $this->upload->display_errors();
    }else{
        $uploadedDetails    = $this->upload->data();    
    }
    print_r($uploadedDetails);die;

?>


您的文件上载代码在哪里，您将无法在
post$this->input->post（'uploadimage'）
中获得
图像数据，而您必须使用
$\u文件
也请参考其他问题和答案
<?php
    $configUpload['upload_path']    = './uploads/';                 #the folder placed in the root of project
    $configUpload['allowed_types']  = 'gif|jpg|png|bmp|jpeg';       #allowed types description
    $configUpload['max_size']       = '0';                          #max size
    $configUpload['max_width']      = '0';                          #max width
    $configUpload['max_height']     = '0';                          #max height
    $configUpload['encrypt_name']   = true;                         #encrypt name of the uploaded file
    $this->load->library('upload', $configUpload);                  #init the upload class
    if(!$this->upload->do_upload('uploadimage')){
        $uploadedDetails    = $this->upload->display_errors();
    }else{
        $uploadedDetails    = $this->upload->data();    
    }
    print_r($uploadedDetails);die;

?>