php – Yii2图像尺寸验证

此验证行不起作用.我可以上传任何尺寸的图像.

['image', 'image', 'minWidth' => 250, 'maxWidth' => 250,'minHeight' => 250, 'maxHeight' => 250], 

在控制器中,我使用.

 $image = UploadedFile::getInstance($this, 'image');

解决方法:

就我所见,最后一行没有任何问题.
https://github.com/yiisoft/yii2/blob/master/docs/guide/tutorial-core-validators.md#yiivalidatorsimagevalidatorimage-

但是你要两次声明图像属性的规则 – 一个作为文件,一个作为图像.图像验证器从文件验证器扩展,因此它继承了它的所有属性.

Image Validator (docs):

This validator checks if the input value represents a valid image file. It extends from the file validator and thus inherits all its properties. Besides, it supports the following additional properties specific for image validation purpose:

尝试将其合并到一个规则中,看看是否有帮助.

[
     'image', 
     'image', 
     'minWidth' => 250, 
     'maxWidth' => 250,
     'minHeight' => 250, 
     'maxHeight' => 250, 
     'extensions' => 'jpg, gif, png', 
     'maxSize' => 1024 * 1024 * 2
],

编辑：
您需要将图像保存在$model中,如$model-> image,如果您在控制器中,则可通过模型验证规则进行验证.

这是一个很好的例子：
http://www.yiiframework.com/doc-2.0/guide-input-file-upload.html