基于 Yii 2.0 上传文件时，可接受上传的文件扩展名列表中已经添加：.jpg，仍然不允许上传的解决

{
    "code": 226004,
    "message": "数据验证失败：只允许使用以下文件扩展名的文件：ogg, pdf, xml, zip, gz, mp4, mp3, wav, webm, gif, jpeg, jpg, png, webp, svg, svgz, tiff, css, csv, txt, vcf, vcard, mov, qt, mkv, mk3d, mka, mks, wmv, flv, doc, docx, xls, xlsx, ppt, pptx。"
}

Array
(
    [0] => yii\web\UploadedFile Object
        (
            [name] => 20191204113827.jpg
            [tempName] => E:\phpuploadtmp\php6053.tmp
            [type] => image/jpeg
            [size] => 1970110
            [error] => 0
        )

)

    /**
     * Checks if given uploaded file have correct type (extension) according current validator settings.
     * @param UploadedFile $file
     * @return bool
     * @throws InvalidConfigException when the `fileinfo` PHP extension is not installed and `$checkExtension` is `false`.
     */
    protected function validateExtension($file)
    {
        $extension = mb_strtolower($file->extension, 'UTF-8');

        if ($this->checkExtensionByMimeType) {
            $mimeType = FileHelper::getMimeType($file->tempName, null, false);
            if ($mimeType === null) {
                echo 1;
                exit;
                return false;
            }

            $extensionsByMimeType = FileHelper::getExtensionsByMimeType($mimeType);

            if (!in_array($extension, $extensionsByMimeType, true)) {
                // MS Office 2007 扩展(docx、xlsx)，其 MIME 类型为 application/zip 的特殊处理
                $msMimeTypes = ['application/zip'];
                $msExtensions = ['docx', 'xlsx'];
                if (!(in_array($mimeType, $msMimeTypes) && in_array($extension, $msExtensions)))
                {
                    echo 2;
                    exit;
                    return false;
                }
            }
        }

        if (!in_array($extension, $this->extensions, true)) {
            echo 3;
            exit;
            return false;
        }

        return true;
    }

image/png

Array
(
    [0] => png
)

jpg

{
    "code": 10000,
    "message": "上传资源成功",
    "data": {
        "items": [
            {
                "original_file_name": "20191204113827 .png",
                "relative_path": "/tmp/2020/01/21/1579571397.5836.1739899586.png",
                "url": "http://127.0.0.1/pcs-api/storage/tmp/2020/01/21/1579571397.5836.1739899586.png"
            }
        ]
    }
}