Question

i have a form in three steps, from step 1 to step two there is a checkbox, i would like to keep the checkbox value in a session and also to show if it’s checked or unchecked even if the user goes to step 3 of the form then comes back to step two,
right now on form submit i have all the $_POST vars in $_SESSION vars but i cant make it work with checkboxes, this is what i got right now:

   <input type="checkbox" value="<?php  echo isset($_POST['afficher_ddn'])? "1":"0";  ?>"
   style="margin-left: 20px;" name="afficher_ddn" id="afficher_ddn" 
<?php echo $_SESSION['afficher_ddn']=="1" ? "checked" : ""; ?> />

but this doesnt work.

Answer 1

try this example separetly

Make a page test.php as:

    <?php
    session_start();
    ?>
    <form methos='post' method='post' action='test1.php'>
       <input type="checkbox" value="1"
       style="margin-left: 20px;" name="afficher_ddn" id="ddn"
    <?php echo $_SESSION['afficher_ddn']=="1" ? "checked" : ""; ?> /><br>
Name:<input type='text' name='f1' value='<?php echo $_SESSION['f1'] ?>' ><br>
Select:<select name='s1'>
<option value="" <?php echo $_SESSION['s1']=="" ? "selected" : ""; ?>></option>
<option value="1" <?php echo $_SESSION['s1']=="1" ? "selected" : ""; ?>>1</option>
<option value="2" <?php echo $_SESSION['s1']=="1" ? "selected" : ""; ?>>2</option>
</select><br>
Test:
<textarea name='tex1'><?php echo $_SESSION['tex1']; ?></textarea>

    <input type='submit'  value='submit'>
    </form>

Make a second page test1.php as:

    <?php
    session_start();
    print_r($_POST);
    echo $_SESSION['afficher_ddn']=$_POST['afficher_ddn'];
echo $_SESSION['f1']=$_POST['f1'];
echo $_SESSION['s1']=$_POST['s1'];
echo $_SESSION['tex1']=$_POST['tex1'];
    ?>
    <form methos='post' action='third.php'>

    <a href='test.php'>Step1</a>
    </form>

and Check