passing hidden input through post is not working (PHP and html)

Question

hi i am working on the following codes , it will take a value from a query and i want to pass the value of the variable to another php page that will do some statements .

this is my form:

  <form method="post" >    
   <input  type="hidden" name="id" value="<?php echo $orderId; ?>"  />
     <button  type="submit" class="button" name="Reorder" value="Reorder">Reorder </button>
    </form>

here is the page that will receive the data and i will extract them from the form :

extract($_POST); 
$orderId=$_POST['id'];

This is the error : Notice: Undefined index: id

This wouldn't submit a user to another page. How are you sending the user to the page? Don't use extract. — user3783243
– user3783243, Commented Dec 18, 2021 at 23:42
@user3783243 i am not sending the user to another page , the second page will just get the data to do some statements , and since it is a form and i need to do something on it , it must to use a method like get or post — Mry
– Mry, Commented Dec 18, 2021 at 23:46
I don't follow. You contradict yourself in the comment, and in the body of the question. i am not sending the user to another page <> the second page will just get the data, nor i want to pass the value of the variable to another php page.. so there is only 1 page or 2 pages?? If 2 as you state multiple times how/when does the user get there? — user3783243
– user3783243, Commented Dec 18, 2021 at 23:49
in page 1 : the user will not enter any data he/she will just click the button and in the second php page will receive the hidden input value to do some statements — Mry
– Mry, Commented Dec 18, 2021 at 23:54
<form method="post" > will not send the user anywhere. Are you sending the user to the next page with JS or how do they get there? — user3783243
– user3783243, Commented Dec 19, 2021 at 0:06

Arischvaran · Accepted Answer · 2021-12-19 03:19:11Z

1

Your form doesn't have an action method. According to you, the data is being sent to another page.

action = "validate.php"

And you also didn't check whether the button isset.

answered Dec 19, 2021 at 3:19

Arischvaran

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