使用PDO查询生成CSV下载 [英] Generating a CSV download using PDO queries

问题描述

我试图使用户能够在我的服务器上下载所有数据的CSV备份. 这意味着我正在尝试执行多个查询，并将结果放入CSV文件中.

I am trying to make a user able to download a CSV backup of all of their data on my server. This means i am trying to execute multiple query's and placing the results into a CSV file.

这是我到目前为止所拥有的:

This is what i have so far:

    <?php
            // Connect
            include 'config.php'; // Config contains PDO database connection, etc.
                // Generate filename
                $filename = $_SESSION['current_group'].'-'.date('d.m.Y').'.csv';
                // Get backup data from MYSQL database
                $result_users = $conn->prepare('SELECT `user_name`, `user_email` FROM `users` WHERE `group_id` = ?');
                $result_users->execute(array($_SESSION['current_group_id']));
                $result_items = $conn->prepare('SELECT `item_name`, `item_value`, `item_group` FROM `items` WHERE `group_id` = ?');
                $result_items->execute(array($_SESSION['current_group_id']));
                # Create array
                $list = array ("## START OF USER TABLE ##");
                // Append results to array
                while ($row = $result_users->fetch(PDO::FETCH_ASSOC)) {
                    array_push($list, array_values($row));
                }
                array_push($list,"## END OF USER TABLE ##");
                array_push($list,"## START OF ITEMS TABLE ##");
                while ($row = $result_items->fetch(PDO::FETCH_ASSOC)) {
                    array_push($list, array_values($row));
                }
                array_push($list,"## END OF ITEMS TABLE ##");

                // Output array into CSV file
                $fp = fopen('php://output', 'w');
                header('Content-Type: text/csv');
                header('Content-Disposition: attachment; filename="'.$filename.'"');
                foreach ($list as $ferow) {
                    fputcsv($fp, split(',',$ferow));
                }
    ?>

预期的输出应该是这样的:

The expected output is supposed to be something like:

## START OF USERS TABLE ##
"John","[e-mail]"
"James","[e-mail]"
## END OF USERS TABLE ##

## START OF ITEMS TABLE ##
"Soap","A lot","Household"
"Banana","2","Food"
## END OF ITEMS TABLE ##

等

问题是被赋值的值不能正确地推送到$ list数组中. 我该怎么做才能获得想要的结果?

The problem is that the valued do not correctly get pushed into the $list array. What should i do in order to get the wanted result?

谢谢！

推荐答案

我通过以下操作解决了该问题:

I solved it by doing the following:

            // Create array
            $list = array ();

            // Append results to array
            array_push($list, array("## START OF USER TABLE ##"));
            while ($row = $result_users->fetch(PDO::FETCH_ASSOC)) {
                array_push($list, array_values($row));
            }
            array_push($list, array("## END OF USER TABLE ##"));

            // Output array into CSV file
            $fp = fopen('php://output', 'w');
            header('Content-Type: text/csv');
            header('Content-Disposition: attachment; filename="'.$filename.'"');
            foreach ($list as $ferow) {
                fputcsv($fp, $ferow);
            }

这篇关于使用PDO查询生成CSV下载的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！