Question

我正在开发一个项目，我将文件直接存储在MySQL数据库中。代码工作得很好，存储和下载文本文件，图片和PDF，但是当使用Excel电子表格时，它有一个问题。

如果我存储Excel传播（.xlsx）文件，上传工作正常，但是当我下载文件时，下载似乎工作正常，但是当我打开电子表格时，我得到以下内容：

$crawler2 = $client->followRedirect();

当我按We found a problem with some content in 'filename.xlsx'. Do you want us to try to recover as much as we can? If you trust the source of this workbench, click Yes?'时，我会得到以下内容：

Yes

执行此操作时，Excel加载正常，一切看起来都不错，但为什么我会收到此错误，为什么需要修复它。

我使用以下内容存储文件：

Excel completed file level validation and repair. Some parts of this workbook may have been repaired or discarded.

我使用以下内容下载文件：

private function writeFileToDatabase($fileName, $tmpName, $type, $fileSize, $fileArea, &$error)
        {
            $fileName = mysqli_escape_string($this->conn, $fileName);
            $fileSize = mysqli_escape_string($this->conn, $fileSize);
            $type = mysqli_escape_string($this->conn, $type);
            $fileArea = mysqli_escape_string($this->conn, $fileArea);

            //Open the uploaded file
            $fh = fopen($tmpName, 'r');
            if (!$fh)
            {
                $error = "Could not open uploaded file";
                return false;
            }
            $content = fread($fh, filesize($tmpName));
            $content = mysqli_escape_string($this->conn, $content);
            fclose($fh);

            //Store the file in the database
            $query = "INSERT INTO file_store (RecordID, Area, FileName, ContentType, Size, FileContent) "
                . "VALUES ('$this->recordID', '$fileArea', '$fileName', '$type', '$fileSize', '$content')";
            $result = $this->conn->query($query);
}

Answer 1

之后

echo $data["FileContent"];

尝试添加此内容：

ob_clean();
flush();

如果仍然无效 - 可能会尝试捕获内容类型，如果不是文本文件则添加另一个标题：

header('Content-Transfer-Encoding: binary');

将文件内容直接导入数据库 - 需要修复的Excel电子表格

1 个答案: