如何在codeigniter中进行图片上传？

问题描述：

我正尝试上传根文件夹中的图像及其在数据库中的文件名。这里是我做的上传功能：如何在codeigniter中进行图片上传？

 public function add_blog($id=0){ 
     if(!empty($_FILES['picture']['name'])){ 
      $config['upload_path'] = 'uploads/blog_image'; 
      $config['allowed_types'] = 'jpg|jpeg|png|gif'; 
      $config['file_name'] = $_FILES['picture']['name']; 

      //Load upload library and initialize configuration 
      $this->load->library('upload',$config); 
      $this->upload->initialize($config); 
      // print_r($value['name'][$s]);exit; 
      if($this->upload->do_upload('picture')){ 
       $uploadData = $this->upload->data(); 
       $picture = $uploadData['file_name']; 
        print_r($picture); exit; 
      } 
      } 
      print_r($config['file_name']); exit; 


    $data['blog_data']=array('blog_post'=>$this->input->post('blog_post'), 
          'posted_by'=>$this->input->post('posted_by'), 
          'blog_image'=>$picture); 

if ($id==0){ 
     $this->db->insert('blog',$data['blog_data']); 
     // $last_id = $this->db->insert_id(); 

     } 
    else { 
    $this->db->where('id',$id); 
    // $last_id = $this->db->insert_id(); 
    $this->db->update('blog',$data['blog_data']); 

} 
}

这里的问题是我能够插入除图像以外的其他数据。我用print_r（$ config [file_name]）获得图像名称，如果我做print_r（）并退出，如果不是，它只会插入除图像之外的其他数据。但该图像既不上载到根文件夹中，也不上载到数据库中。如果我给非现有的上传路径，那么它也不会抛出任何错误。我认为If内部的代码没有执行。我该如何解决这个问题？提前致谢。

答

private function _upload_image() { 
    $this->load->library('upload'); 
    if ($_FILES && $_FILES['picture']['name'] !== ""){ 
     $config['upload_path'] = 'uploads/blog_image'; 
     $config['allowed_types'] = 'jpg|jpeg|png|bmp'; 
     $config['max_size']  = 10000; 
     /*the picture name must be unique, use function now()*/ 
     $config['file_name']  = $_FILES['picture']['name'] . now(); 
     $config['file_ext_tolower']  = TRUE; 
     $this->upload->initialize($config); 
     if ($this->upload->do_upload('picture')){ 
      $file_name = $this->upload->data()['file_name']; 
      $full_path = $this->upload->data()['full_path']; 
      /*If you want create a thumb, use this part*/ 
      $this->load->library('image_lib'); 
      $config = array(
       'source_image'  => $path, 
       'new_image'   => $this->_image_path, 
       'maintain_ratio' => true, 
       'width'    => 128, 
       'height'   => 128, 
       'create_thumb'  => TRUE, 
       'thumb_marker'  => '_thumb', 
      ); 
      $this->image_lib->initialize($config); 
      $this->image_lib->resize(); 
      /*Save in database*/ 
      $this->db->insert('blog', [ 
       'file_name' => $file_name, 
       'full_path' => $full_path 
      ]); 
     } else { 
      //if picture is empty, do something 
     } 
    } 
}

你不需要使用$ _FILES & & $ _FILES [ '图片'] [ '名']！ ==“”只有当你的表单有图片字段作为可选字段$ this-> upload-> do_upload（'picture'）并从$ this-> upload-> data（）获取数据时，请阅读手册

public function add_blog() 
    { 
      $config['upload_path']   = '.uploads/blog_image'; 
      $config['allowed_types']  = 'jpg|jpeg|png|gif'; 
      $config['max_size']    = 10000; 

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

      if (! $this->upload->do_upload('picture')) 
      {//Do something with errors 
        $errors = $this->upload->display_errors(); 
      } 
      else 
      { 
        $data = $this->upload->data(); 
        $this->db->insert('blog', [ 
          'file_name' => $data['file_name'], 
          'full_path' => $data['full_path'] 
        ]); 
      } 
    }

不能我们用一个简单的方法做到这一点？ –

是的，我会更新de post –

答

我只是没有提到要上传的文件大小。我在我上面的代码中做了这个并且工作。编辑

public function add_blog($id=0){ 
     if(!empty($_FILES['picture']['name'])){ 
      $config['upload_path'] = 'uploads/blog_image'; 
      $config['allowed_types'] = 'jpg|jpeg|png|gif'; 
      $config['max_size']    = 0; 
      $config['file_name'] = $_FILES['picture']['name']; 

      //Load upload library and initialize configuration 
      $this->load->library('upload',$config); 
      $this->upload->initialize($config); 
      // print_r($value['name'][$s]);exit; 
      if($this->upload->do_upload('picture')){ 
       $uploadData = $this->upload->data(); 
       $picture = $uploadData['file_name']; 
        // print_r($picture); exit; 
      } 
      } 
      // print_r($config['file_name']); exit; 


$data['blog_data']=array('blog_post'=>$this->input->post('blog_post'), 
          'posted_by'=>$this->input->post('posted_by'), 
          'blog_image'=>$picture); 

if ($id==0){ 
     $this->db->insert('blog',$data['blog_data']); 
     // $last_id = $this->db->insert_id(); 

} 
else { 
    $this->db->where('id',$id); 
    // $last_id = $this->db->insert_id(); 
    $this->db->update('blog',$data['blog_data']); 

} 
}

而且该代码同时适用于插入和更新。

如何在codeigniter中进行图片上传？

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