PHP将MySQL导出为CSV - 显示HTML的结果
[英]PHP Export MySQL to CSV - Results showing HTML
问题描述
I saw a post on this already, but it didn't really provide a solution (that has worked for me at least)... 
我已经看到了这个帖子，但它并没有真正提供解决方案（至少对我有用）......
I have a PHP page that does some basic MySQL queries, the results of which are displayed on the page. 我有一个PHP页面，它执行一些基本的MySQL查询，其结果显示在页面上。 I'm using some $_GET and $_SESSION variables throughout this process. 我在整个过程中使用了一些$ _GET和$ _SESSION变量。
In the same page, I also allow the user to "Export to CSV" (by calling a function). 在同一页面中，我还允许用户“导出到CSV”（通过调用函数）。 The file returned from the export has the CSV results at the bottom, but also contains the HTML of my page (which calls the function). 从导出返回的文件底部有CSV结果，但也包含我的页面的HTML（调用该函数）。
Now, at the top of the page I have ob_start() and at the bottom I have ob_flush(), otherwise on page load I will receive some "Cannot modify header..." errors. 现在，在页面顶部我有ob_start（），在底部我有ob_flush（），否则在页面加载时我会收到一些“无法修改标题...”错误。 So, as suggested in the post that I read: 所以，正如我在帖子中所建议的那样：
My guess is that you've got some sort of template that generates the same HTML header and footer regardless of the page that is requested. Sometime before the exportCSV function is called, the header is generated.
You don't show the bottom of the output, but I'll bet the footer is there too, since I suspect the flow control will continue on to that code after the function exits."
(http://stackoverflow.com/questions/207019/why-am-i-getting-html-in-my-mysql-export-to-csv/207046)
Does anyone have any ideas on how I can prevent this from happening? 有没有人对如何防止这种情况发生任何想法？ Let me know if I should post some of my code and I will... 如果我发布一些代码，请告诉我，我会......
Thanks! 谢谢！
EDIT: 编辑：
When calling ob_end_clean() before I call my export function, it gets rid of any html before the CSV. 在调用导出函数之前调用ob_end_clean（）时，它会删除CSV之前的任何html。 However, I am still getting some HTML closing tags after the CSV results... 但是，在CSV结果后，我仍然会收到一些HTML结束标记...
fname lname MONTH WeekdayCount WeekendCount
John Doe 8 1 0
John Doe 7 3 2
Jane Smith 7 3 2
</div>
</div>
</div>
</body>
</html>
EDIT: 编辑：
This issue has been solved by calling exit() after calling the CSV export script. 调用CSV导出脚本后调用exit（）解决了此问题。
3 个解决方案
解决方案1
8 已采纳 2009-07-28 23:57:40
You could try calling ob_end_clean() before you output the csv data, and it should throw away any output you have already printed as HTML. 您可以在输出csv数据之前尝试调用ob_end_clean（），它应该丢弃您已经打印为HTML的任何输出。
You could call exit() after outputting your csv data in order to stop the rest of you page being printed. 您可以在输出csv数据后调用exit（）以停止打印其余页面。
This doesn't seem a particularly good approach, can you not have a separate PHP script to output the csv which doesn't include the headers and footers by default? 这似乎不是一个特别好的方法，您是否可以没有单独的PHP脚本来输出默认情况下不包含页眉和页脚的csv？
解决方案2
2 2009-07-28 23:50:36
Without seeing your script it's hard to say what exactly the problem is other than to say that you can't send HTTP headers to the client after you've sent ANY content. 在没有看到您的脚本的情况下，除了说您在发送任何内容后无法向客户端发送HTTP标头之外，很难说出问题究竟是什么。 This includes white-space. 这包括空白区域。 Sometimes you'll have non-printable characters before your opening <?php statement as well. 有时你在打开<?php语句之前会有不可打印的字符。 If necessary use a hex editor to find these. 如有必要，使用十六进制编辑器来查找这些。
The top of your export.php script should look something like: export.php脚本的顶部应如下所示：
<?php
header('Content-Type: text/csv');
...
Is this the case? 是这样的吗？
解决方案3
0 2015-07-22 01:40:44
I face this problem also and solved it already. 我也面临这个问题并且已经解决了。 My code is: 我的代码是：
<html>
<title> </title>
<body>
<?php
....Code which output MySQL to CSV
?>
</body></html>
Below are example of CSV file which come out with HTML code at top. 以下是顶部带有HTML代码的CSV文件示例。
<html>
<head>
<meta http-equiv="Content-Language" content="th">
<meta http-equiv="content-Type" content="text/html; charset=window-874">
<meta http-equiv="content-Type" content="text/html; charset=tis-620">
<title> Super Man </title>
</head>
<body bgcolor="#FFFFD4">
<SQL rows resulted>
xx5497 1/7/2015 1:03 SSFTM SSFTVM 35 Condition2
xx5498 1/7/2015 1:04 SSDHN SSDHKN 13 Condition2
xx5499 1/7/2015 1:06 SSFTM SSFTVM 14 Condition2
When running, CSV file got the first 12 lines on the top. 运行时，CSV文件在前面有前12行。 It looked so crazy to me. 它对我来说太疯狂了。 I solved it by moving the PHP code to the top. 我通过将PHP代码移到顶部来解决它。 Then the result is OK. 然后结果没问题。 Only SQL results were output to CSV file. 只有SQL结果输出到CSV文件。
<?php
....Code which output MySQL to CSV
?>
<html>
<title> </title>
<body>
</body></html>
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