How validate file upload max size 500KB

Question

How validating the upload files size by up to 500Kb? I'm doing well, but it's not working out:

public function rules()
    {
        return [
...
           'myfile'
            ], 'file', 'extensions' => 'pdf, jpg', 'maxSize' => 4096000, 'tooBig' => 'Limit is 500KB' ],
        ];
    }

Answer 1

You specified wrong maxSize.

From offical docs:

The maximum number of bytes required for the uploaded file. Defaults to null, meaning no limit. Note, the size limit is also affected by 'upload_max_filesize' INI setting and the 'MAX_FILE_SIZE' hidden field value.

See also $tooBig for the customized message for a file that is too big.

500 kilobytes is 500 * 1024 bytes = 512 000 bytes.

public function rules()
{
    return [
        ['myfile', 'file', 'extensions' => 'pdf, jpg', 'maxSize' => 512000, 'tooBig' => 'Limit is 500KB'],
    ];
}

Also you can specify it like 'maxSize' => 500 * 1024, this is more readable and you don't have to do any calculations (for more complex measure units this is preferable option).

Useful links:

• What is kilobyte?
• FileValidator $maxSize