html电子邮件中的表单POST在PHP中看不到变量

Question

i send an HTML email with a form and a button like this:

<form action="http://myurl/index.php" method="post">
<input type="hidden" name="testing" value="123456">
<button  class="btn" type="submit">SEND</button>
</form>

then in my index.php page i read the testing variable, in this way:

echo $_POST['testing'];

but i can't read the variable and give me this:

Notice: Undefined index: testing

there is a way to send a variabile from an html mail to a php page?

Answer 1

Oh. Got that Email Part now.

Most Mail-Programs won't do POST requests, for security/privacy reasons. Use GET here:

in HTML: <a href="http://myurl/index.php?testing=123456">SEND</a>
and in PHP: echo $_GET['testing']

Of course the data is visible in that case - but that's the entire point.