使用POST在PHP页面之间传输数据的问题 [英] Issues transfering data between PHP pages with POST
问题描述
我在使用POST在PHP页面之间传输值时遇到问题。我在页面底部使用隐藏字段来说明我在页面上有多少项（学生行）。我还有一个过滤选项，可以减少页面上可见的项目数量。当我从过滤页面提交数据时，所有值（包括隐藏的值）都不用担心。当我使用未过滤的页面提交数据时，隐藏的值无法通过（因此我的数据收集不会发生）。
I am having an issue transferring values between pages in PHP using POST. I am using a hidden field at the bottom of a page to state how many items (rows of students) I have on the page. I also have a filter option which reduces the number of items visible on the page. When I submit data from the filtered page, all values (including the hidden ones) get through no worries. When I submit data with the page unfiltered, the hidden values do not get through (and therefore my data collection does not happen).
关键是，这不会发生在我的基于Apache的测试环境中，只有当我将其移动到基于IIS的生产环境时才会发生。
The clincher is, this does not happen in my Apache based test environment, it only happens when I move this to an IIS based production environment.
这是初始页面的屏幕截图（实际数据已经过出于隐私原因删除，显示输入。有12行，每行30个输入（总共360个）：
Here is a screen shot of the initial page (actual data has been removed for privacy reasons), which shows the inputs. There are 12 rows of 30 inputs each (360 total):
以下是我需要隐藏字段的HTML代码：
Here is the HTML code with the hidden fields which I need:
<input type="hidden" value="12" name="numStudents">
<input type="hidden" value="10" name="numTasks">
<input type="hidden" value="3" name="numCriteria">
<input class="btn btn-primary btn-large" type="submit" value="Save" name="submit">
以下是接收值的PHP代码：
Here is the PHP code which receives the values:
//Get the general information from the form
$numStudents = $common->clean($_POST["numStudents"], $CON);
$numTasks = $common->clean($_POST["numTasks"], $CON);
$numCriteria = $common->clean($_POST["numCriteria"], $CON);
//Loop to get grades for all students
$output = "";
$flagChange = FALSE;
$count = 0;
for($i = 0; $i < $numStudents; $i++)
当我直接回显$ numStudents或$ _POST [numStudents]的值时，什么都没有出现。
When I echo out the value of either $numStudents or $_POST["numStudents"] directly, nothing appears.
真正令人困惑的是 - 当我有一个列表1或2名学生，未经过滤的数据没有问题（echo显示正确的值）。如前所述，如果我过滤数据以便每个学生只显示6列输入，则数据会毫无问题地发出。
The really confusing thing is - when I have a list of 1 or 2 students, the unfiltered data comes through without an issue (the echo displays the correct value). As mentioned before, if I filter the data so that only 6 columns of inputs are shown for each student, the data comes through without an issue.
IIS是否有最大值POST变量允许的值数量？如果是这样，可以改变吗？我检查了我的PHP.ini文件，post的最大大小设置为8M（这个数据甚至不应该接近）。
Does IIS have a maximum number of values allowed in the POST variable? If so, can this be changed? I have checked my PHP.ini file and the max size of post is set to 8M (which this data should not even approach).
我需要的地方还有其他设置改变？
Is there another setting somewhere I need to change?
推荐答案
因此，我能够重新构建我的搜索查询以找到解决方案。事实证明，PHP中有一个设置，用于POST数组中允许的最大元素数。我的限制设置为默认值1000，我现在已将其提高到3000。
So, I was able to re-frame my search query to find a solution to this. It turns out that there is a setting in PHP for the maximum number of elements allowed within the POST array. My limit was set to the default of 1000, I have now upped this to 3000.
PHP.ini文件中的设置为：max_input_vars
The setting in the PHP.ini file is: max_input_vars
我发现此页面有助于解决此问题：
I found this page helped solve this issue:
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