php - 如何限制上传图片比例为16 :9 in codeigniter?

Question

这是我用来上传图片的代码。

$this->load->library('upload');
$ext = pathinfo($file_name, PATHINFO_EXTENSION);

$img_name = now() . "." . $ext;

$imgConfig['upload_path'] = $this->image_path;
$imgConfig['file_name'] = $img_name;
$imgConfig['max_size'] = '2048';
$imgConfig['allowed_types'] = 'jpg|png|bmp';
$imgConfig['overwrite'] = FALSE;
$this->upload->initialize($imgConfig);

if ($this->upload->do_upload("image_url")) {
    $this->Playlist_model->update_playlist($insert_id, array("image_url" => $img_name));
}

前端只是一个

<input type = 'file' >

问题是，由于图片上传应该是视频缩略图，我应该怎么做才能实现上传？例如在前端使用插件来限制/裁剪(任何建议)

另外，在服务器端我该如何检查？

Answer 1

maintain_ratio

它是你保持比例的偏好

Specifies whether to maintain the original aspect ratio when resizing or use hard values.

更多详情

• https://www.codeigniter.com/user_guide/libraries/image_lib.html
• Resize image according to width only & crop Extra Height , Codeigniter
• Resizing and cropping in Codeigniter