使用表单保存多个会话变量

Question

I am working on a form with fields for dimensions where a customer can fill these fields in and submit them and they will be saved in session variables. So far I succeeded 1 form, but after saving 1 time the data of the fields it needs to be possible for the costumer that he can fill in a form again (for dimensions) and still another and another etc etc.

(I started the session in top of my header)

The form:

<form method="POST">

   <label>A:</label>
   <input name="wz_saving_a" type="text" />

   <label>B:</label>
   <input name="wz_saving_b" type="text" />

   <input name="wz_submit_saving_1" type="submit" class="add_button" value="Add"  />

</form>

PHP for saving data in $_SESSION:

if(isset($_POST['wz_submit_saving_1'])) :

    // Save submit
    $_SESSION['wz_submit_saving_1'] = $_POST['wz_submit_saving_1'];

    // Save wz_saving_a in session
    $_SESSION['wz_saving_a'] =  $_POST['wz_saving_a'];

    // Save wz_saving_b in session
    $_SESSION['wz_saving_b'] = $_POST['wz_saving_b'];

endif;

After submit I show the submitted data to the costumer like:

<?php if(isset($_SESSION['wz_submit_saving_1'])) : ?>

<div id="wz_config_1" class="wz_config">

<ul>
   <li>Your dimensions:</li>
   <li>A: <?php if(isset($_SESSION['wz_saving_a'])) : echo $_SESSION['wz_saving_a']; endif; ?> mm</li>
   <li>B: <?php if(isset($_SESSION['wz_saving_b'])) : echo $_SESSION['wz_saving_b']; endif; ?> mm</li>
</ul>   

<?php endif; ?>  

So this works for 1 submit and if I submit the form the session variables of the first will be refreshed by the new data, but now I need something to do so the costumer can add multiple dimensions sets and save in the Session.

My idea was to change every name of a field by _1 _2 _3 after each form submit. But I don't know how to fix this so I hope someone can give me some advice.

I can give the url of my example if you want?

Thanks!

Answer 1

You can use multidimensional session arrays:

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

Or, just use [] to add new keys, but you are going to have duplicated values

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

Let's say the user types in wz_saving_b the following things:

1, 2, 3

<?php
session_start();
?>
<form method="POST" action="">

   <label>A:</label>
   <input name="wz_saving_a" type="text" />

   <label>B:</label>
   <input name="wz_saving_b" type="text" />

   <input name="wz_submit_saving_1" type="submit" class="add_button" value="Add"  />

</form>
<?php
if(isset($_POST['wz_submit_saving_1'])):
    $_SESSION['wz_saving_b'][$_POST['wz_saving_b']] = $_POST['wz_saving_b'];
?>
<div id="wz_config_1" class="wz_config">

<ul>
   <li>Your dimensions:</li>
   <li>B: <?php if(isset($_SESSION['wz_saving_b'])): foreach($_SESSION['wz_saving_b'] as $k => $v) { echo "$v "; } endif; ?> mm</li>
</ul>
<?php endif; ?>


<?php
var_dump($_SESSION);
?>

Output:

    Your dimensions:
    B: 1 2 3 mm

array (size=1)
  'wz_saving_b' => 
    array (size=3)
      1 => string '1' (length=1)
      2 => string '2' (length=1)
      3 => string '3' (length=1)

---

The requested abstraction:

<?php
session_start();
?>
<form method="POST" action="">

   <label>A:</label>
   <input name="wz_saving_a" type="text" />

   <label>B:</label>
   <input name="wz_saving_b" type="text" />

   <label>C:</label>
   <input name="wz_saving_c" type="text" />

   <label>D:</label>
   <input name="wz_saving_d" type="text" />

   <input name="wz_submit_saving_1" type="submit" class="add_button" value="Add"  />

</form>
<?php
if(isset($_POST['wz_submit_saving_1'])) {
    foreach($_POST as $key => $value) {
        if($key != 'wz_submit_saving_1') {
            $_SESSION[$key][] = $value;
        }
    }
}
?>
<div id="wz_config_1" class="wz_config">

<ul>
   <li>Your dimensions:</li>
   <?php foreach($_SESSION as $k => $v): ?>
    <?php foreach($v as $saving => $wz): ?>
   <li><?= strtoupper(substr($k, 10));?> : <?=$wz;?> mm</li>
    <?php endforeach; ?>
   <?php endforeach; ?>
</ul>


<?php
var_dump($_SESSION);
?>

I did some random inputs here with some numbers. The output is:

    Your dimensions:
    A : 1 mm
    A : 6 mm
    A : 5 mm
    B : 1 mm
    B : 6 mm
    B : 5 mm
    C : 4 mm
    C : 8 mm
    C : 5 mm
    D : 4 mm
    D : 7 mm
    D : 5 mm

array (size=4)
  'wz_saving_a' => 
    array (size=3)
      0 => string '1' (length=1)
      1 => string '6' (length=1)
      2 => string '5' (length=1)
  'wz_saving_b' => 
    array (size=3)
      0 => string '1' (length=1)
      1 => string '6' (length=1)
      2 => string '5' (length=1)
  'wz_saving_c' => 
    array (size=3)
      0 => string '4' (length=1)
      1 => string '8' (length=1)
      2 => string '5' (length=1)
  'wz_saving_d' => 
    array (size=3)
      0 => string '4' (length=1)
      1 => string '7' (length=1)
      2 => string '5' (length=1)

---

Based on the provided code, this should work, I tried to input one time 1 and 2 mm on position x, and then 4 and 5 mm on position y, the output was:

Rechte sparing 1

        Formaat van de sparing:
        A: 1 mm
        B: 2 mm
        Positionering van de sparing:
        x

Rechte sparing 1

        Formaat van de sparing:
        A: 4 mm
        B: 5 mm
        Positionering van de sparing:
        y

Code:

<?php

if(isset($_POST['wz_submit_saving_1'])) :

    $straight_saving = array(
        'wz_str_saving' => $_POST['wz_str_saving'],
        'wz_saving_a' => $_POST['wz_saving_a'],
        'wz_saving_b' => $_POST['wz_saving_b'],
        'wz_submit_saving_1' => $_POST['wz_submit_saving_1']
    );

    $_SESSION['straight_saving'][] = $straight_saving;

endif;


if(isset($_SESSION['straight_saving'])) : 

    foreach($_SESSION['straight_saving'] as $sav) {

?>

<div class="wz_config">

    <h3>Rechte sparing 1</h3>


    <ul>
        <li>
            <ul>
                <li>Formaat van de sparing:</li>
                <li>A: <?php echo $sav['wz_saving_a']; ?> mm</li>
                <li>B: <?php echo $sav['wz_saving_b']; ?> mm</li>
            </ul>
        </li>

        <li>
            <ul>
                <li>Positionering van de sparing:</li>
                <li><?php echo $sav['wz_str_saving']; ?></li>
            </ul>
        </li>
    </ul>

    <div class="clear"></div>

</div><!--End wz_config_1-->

<?php } endif; ?>