Storing $_SESSION variables

426 256MB

I've got a problem. I'm sure I'm being really stupid but I can't seem to be able to rertive a $_SESSION variable.

I run through the code three times using a variable called $setup which I post each time as reset. The first time I go through the code, $setup has no value. The second time, it has the value of 1 and a SESSION variable called value 1 gets set from a POST. The third time, setup has the value of 2. I set a SESSION variable to the value of another POST but the orignal SESSION variable seems to have lost its value.

This is the code when the page is loaded.

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<?php

  session_start();

  $setup=$_POST['reset'];

  if ($setup==NULL)

  {

    $setup=0;

  }

  elseif ($setup==1)

  {

    $_SESSION['value1']=$_POST['value1'];

    $value1=$_SESSION['value1'];

  }

  elseif ($setup==2)

  {

    $value1=$_SESSION['value1'];

    $_SESSION['value2']=$_POST['value2'];

    $value2=$_SESSION['value2'];

  }

?>

When setup is one I can print out value1 however when setup is two is use this code

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echo $value2 . " " . $value1 . ".";

All I get is value2 followed by a dot. Am I doing something wrong here?

Sep 2 '13 #1

Subscribe Post Reply

✓ answered by KeredDrahcir

If would help if I took the PHP out of the Reset button at the bottom. I must have been getting confused with PHP and JavaScript. I was destroying the SESSION each time.
As I said "I'm probably being really stupid" as I was.

1704

KeredDrahcir

426

256MB

Can anyone help me. I can't get any further until this is sorted out. I don't often get large amounts of time so while I have I want to put it to good use.

Sep 4 '13 #2

Exequiel

288

256MB

Can you post your fields or form? I've created like your code, here it is,

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 <?php 

    session_start();

    ob_start();

    ?>
 
    <form method="post">

        value1: <input type="text" name="value1" />  

        value2: <input type="text" name="value2" />  

    <input type="submit" name="submit" value="Submit" />

    <br />

    <hr/>

     <?php 

        if(isset($_POST['submit']))

        {

            $_SESSION['value1']=$_POST['value1'];

            $_SESSION['value2']=$_POST['value2'];

            echo 'value1 : '.$_SESSION['value1'].'<br>value2 :  '.$_SESSION['value2'];

        }

    ?>

Sep 5 '13 #3

KeredDrahcir

426

256MB

Here's the full program.

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<?php

  session_start();

  $setup=$_POST['reset'];

  if ($setup==NULL)

  {

    $setup=0;

  }

  elseif ($setup==1)

  {

    $_SESSION['value1']=$_POST['value1'];

    $value1=$_SESSION['value1'];

  }

  elseif ($setup==2)

  {

    $value1=$_SESSION['value1'];

    $_SESSION['value2']=$_POST['value2'];

    $value2=$_SESSION['value2'];

  }

?>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"

 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
 
  <head>

    <title>

      Program

    </title>

    <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"/>

    <meta name="author" content="Richard Derek Young"/>

  </head>
 
  <body>

    <h1>

      Program

    </h1>

    <p>

      Use this program to create it.

    </p>

<?php

    if ($setup==0)

    {

?>

      <p>

        <form method="post" name="world" action="program.php">

          Enter value 1. <br/>

          <input type="text" name="value1"/>

<?php

          $setup++;

?>

          <input type="hidden" name="reset" value="<?=$setup;?>"/>

          &nbsp; <input type="submit" value="Next"/>

        </form>

      </p>

<?php

    }

    elseif ($setup==1)

    {

      $setup++;

?>

      <form method="post" name="description" action="program.php">

        <input type="hidden" name="reset" value="<?=$setup;?>"/>

        <p>

          <input type="radio" name="value2" value="1" onclick="javascript:document.description.submit()"/> &nbsp; Option 1 <?=$value1;?>.

        </p>

        <p>0

          <input type="radio" name="value2" value="2" onclick="javascript:document.description.submit()"/> &nbsp; Option 2 <?=$value1;?>

        </p>

        <p>

          <input type="radio" name="value2" value="3" onclick="javascript:document.description.submit()"/> &nbsp; Option 3 <?=$value1;?>.

        </p>

        <p>

          <input type="radio" name="value2" value="4" onclick="javascript:document.description.submit()"/> &nbsp; Option 4 <?=$value1;?>.

        </p>

        <p>

          <input type="radio" name="value2" value="5" onclick="javascript:document.description.submit()"/> &nbsp; Option 5 <?=$value1;?>.

        </p>

        <p>

          <input type="radio" name="value2" value="6" onclick="javascript:document.description.submit()"/> &nbsp; Option 6 <?=$value1;?>.

        </p>

        <p>

          <input type="radio" name="value2" value="7" onclick="javascript:document.description.submit()"/> &nbsp; Option 7 <?=$value1;?>.

        </p>

      </form>

<?php

    }

    elseif ($setup==2)

    {

      $setup++;

      echo $value2 . " " . $value1 . ".";

?>

      <p>

        More Stuff.

      </p>

<?php

    }

?>

    <p>

      <button onclick="<? session_destroy();?>window.location.href = 'program.php';">Reset</button>

    </p>

  </body>

</html>

Is that what you were asking for? It's on line 90 that I only get value2 echoed.

Sep 6 '13 #4

Dormilich

8,658

Expert Mod 8TB

best thing you can do is print out the $_POST and $_SESSION arrays to look at the data directly.

turning on error reporting might help as well.

Sep 7 '13 #5

KeredDrahcir

426

256MB

How do I do that? Is there a special piece of code to print the arrays?
I take it you can't see anything obvious wrong with the code?

Sep 7 '13 #6

Dormilich

8,658

Expert Mod 8TB

Is there a special piece of code to print the arrays?

print_r(), var_dump(), var_export()

Sep 7 '13 #7

KeredDrahcir

426

256MB

It gives me .Array ( [value2] => value2 ) where value2 is the expected value. Do you know where the first $_SESSION is getting lost? Am I setting it wrong?

Sep 8 '13 #8

Dormilich

8,658

Expert Mod 8TB

also check the $_POST array for each request.

Sep 8 '13 #9

KeredDrahcir

426

256MB

Sep 8 '13 #10

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Storing $_SESSION variables

✓ answered by KeredDrahcir

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