Question

我现在在Codeigniter工作，在上传时调整图片大小有一些问题。我尝试了一些代码，但工作不正常。下面我添加了文件上传功能：

public function add_to_event()
{
    if (!empty($_FILES['event_image']['name'])) {
        $config['upload_path']   = './images/';
        $config['allowed_types'] = 'jpg|jpeg|png|gif';
        $config['file_name']     = $_FILES['image']['name']; //image upload-url to db and image to system directory

        //Load upload library and initialize configuration
        $this->load->library('upload', $config);
        $this->upload->initialize($config);

        if ($this->upload->do_upload('event_image')) {
            $uploadData = $this->upload->data();
            $image      = $uploadData['file_name'];
        } else {
            $image = '';
        }
    } 
    else {
    $image = '';
    }
    $image ="http://localhost/infi-admin/images/$image";

    $event_title=$this->input->post('event_title');
    $event_description=$this->input->post('event_description');

    $this->load->model('User_model');
    $data= array('event_title' =>$event_title ,
        'event_description' =>$event_description,
        'event_image'=>$image
    );

    $this->User_model->add_to_event_model($data);
    redirect('Site/event_view');
}

这是我的控制器功能，可以将图像与其他字段一起上传

Answer 1

这可能有助于您入门：

$config['image_library'] = 'gd2';
$config['source_image'] = '/path/to/image/mypic.jpg';
$config['create_thumb'] = TRUE;
$config['maintain_ratio'] = TRUE;
$config['width']         = 75;
$config['height']       = 50;

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

$this->image_lib->resize();


if (!empty($_FILES['event_image']['name'])) {
        $config['upload_path']   = './images/';
        $config['allowed_types'] = 'jpg|jpeg|png|gif';
        $config['file_name']     = $_FILES['image']['name'];//image upload-url to db and image to system directory

        //Load upload library and initialize configuration
        $this->load->library('upload', $config);
        $this->upload->initialize($config);

        if ($this->upload->do_upload('event_image')) //name in db
        {
            $uploadData = $this->upload->data();
            $image      = $uploadData['file_name'];

            $config['image_library'] = 'gd2';
            $config['source_image'] = $config['upload_path'].$config['file_name']
            $config['create_thumb'] = TRUE;
            $config['maintain_ratio'] = TRUE;
            $config['width']         = 75;
            $config['height']       = 50;

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

            $this->image_lib->resize();

            // image name will be $config['upload_path'].$config['file_name'].'_thumb.jpg'
        } 
        else {
            $image = '';
             }
    } 
    else {
        $image = '';
         }
            $image ="http://localhost/infi-admin/images/$image";

 $event_title=$this->input->post('event_title');
    $event_description=$this->input->post('event_description');

                 $this->load->model('User_model');
                 $data= array('event_title' =>$event_title ,
    'event_description' =>$event_description,
    'event_image'=>$image);

 $this->User_model->add_to_event_model($data);
  redirect('Site/event_view');


}

这绝对应该被抽象为模型或服务。控制器不需要知道如何完成图像上传和调整大小。在保存之前，还要考虑重命名图像文件并在名称中添加一些随机性。

如何在codeigniter上传时减小图像的大小？

1 个答案: