如何将隐藏文本字段的值传递给另一个php页面？

I have a php page with the following:

echo "<form method='post'><input type='hidden' id='memberIdd' name='memberIdd' value=" . $memberId . "></form>";

Now I created another php page and want to grab the value of this hidden field and place it into another variable. How can I do this? I tried using this for my second php page:

$member = $_POST['memberIdd'];

But I just keep getting "undefined" for $member.

Thanks

<form method='post' action='secondpage.php'>

http://www.w3.org/TR/html4/interact/forms.html#h-17.1

If you don't write the action then the posted data goes to the same page where you were.

And by the way, the variable $memberId (the one in your question) at the firstpage.php should be defined. In other case it will prompt error message.

Edit: It will better for you to use HTML codes out of PHP.

I think your problem is that you did not set the right action in the form and you also should have a submit button. Thus, your form should look like:

echo '<form action="url-to-the-second-page.php" method="post">';
echo '<input type="hidden" id="memberIdd" name="memberIdd" value="' . $memberId . '">';
echo '<input type="submit" name="submit" value="submit" />';
echo '</form>';

That's a hidden form field, but you've no submit button. The value won't appear in the second page unless you specify it as the form's action (i.e. where the form should be submitted to), and also submit the form. e.g.

echo "<form action='page2.php' method='post'>
      <input type='hidden' id='memberIdd' name='memberIdd' value=" . $memberId . ">
      <input type="submit" value="Go to page 2">
      </form>";

Alternatively, you could store the value as a session variable.