CODEWITHSUNDEEP
php
Kikert
Kikert

Reputation: 89

PHP Passing a variable to another page then pass it back to the original page

This is a little bit quite confusing to explain. I want to know how to store a string into a variable and pass it to the next page and in that next page pass that variable again to another variable then that variable will pass it back to the original page.

Example:

I have two PHP pages. lets call them form1.php and form2.php

In form1.php, I will input Hello and it will be stored in var1.

var1 will be sent to form2.php and it is stored in var2 in form2.php as well.

in form2.php, var2 is passed to var3 and var3 will be sent back to form1.php.

And output Hello in form1.php using var3 not var1.

This is where I got stuck. Can't figure out how to do this. Please comment if the question is a little vague, even I cant seem to figure it out myself. Thanks.

Upvotes: 1

Views: 200

Answers (4)

Loko
Loko

Reputation: 6679

You want to use Sessions. With sessions you can pass variables to a different page.

You have to start sessions on both pages.

 session_start();

After that you can store variables in a session.

For example:

$var1 = $_SESSION['name'];

Now you can use IT in every page with session_start();

Upvotes: 1

Jan Turoň
Jan Turoň

Reputation: 32912

From what I understand, you need two forms to send data from the first to the second and from the second back to the first. In this communication, you don't need the third var, how about this?

form1.php

<form method=POST action="form2.php">
  <input type="text" name="var1" value="<?=@$_POST["var2"];?>">
  <input type="submit" value="Continue">
</form>

form2.php

<form method=POST action="form1.php">
  <input type="text" name="var2" value="<?=@$_POST["var1"];?>">
  <input type="submit" value="Continue">
</form>

Upvotes: 0

BillyBigPotatoes
BillyBigPotatoes

Reputation: 1338

My understanding is that you want to pass some data between two distinct forms - you need to consider that these forms are completely independent form each other so you will need to pass data back to the browser or leverage a server side session.

Depending on your use case you could:

Submit data to form1.php - this would then return a form with additional fields ready for submision to form2.php

The trick here - is that data that needs to be passed between forms would be included in the generation of the second form as hidden elements. 

<input type="hidden" id="var1" value="data from form1" />

You can have as many hidden types as you need.

Be aware this approach is not very secure - so you may need consider defences e.g. csrf - or using sessions and tracking the data on the server side.

Upvotes: 0

TheMethod
TheMethod

Reputation: 3001

Well if you are actually using forms then you should be able to just grab the values of the variables in $_GET or $_POST (depending on the method used by the forms). You could just store the values in hidden inputs the user doesn't see and use that to pass things around:

<input type = "hidden" value = "<?php echo $_GET['var2'];?>" />

If this isn't what you need you may want to look at sessions to maintain state throughout your site.

Upvotes: 0

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