csv文件中的数据格式不正确，仅在一列中显示为javascript代码或html代码
用户控制器中的代码

for export data in csvfile from database of user table 
    public function export() {
            $this->response->download("export.csv");

            $data = $this->Users->find('all');
            $this->set(compact('data'));

            $this->layout = 'ajax'; 

            return;
        }

    // app/Views/Users/export

    header('Content-type: text/csv');
    header("Content-Disposition: attachment; filename=export.csv");  

    foreach ($data as $row) {
        foreach ($row['Users'] as $cell) {
            // Escape double quotation marks
            $cell = '"' . preg_replace('/"/','""',$cell) . '"';
        }
        echo implode(',', $row['Users']) . "\n";
    }

输出屏幕截图：