Drop down box

[j05hr]

I've got a dropdown box and when you submit the value, the drop down resets itself.

 

http://www.bulletproofwebdesign.co.uk/orderform/calculator.php

 

<form action="calculator.php" method="post">
  <p>Quantity: 
    	<select name="quantity">
<option value= "100" <?php if (isset($_POST['quantity'])) echo $_POST['quantity']; ?>>100</option>
                <option value= "250" <?php if (isset($_POST['quantity'])) echo $_POST['quantity']; ?>>250</option>
                <option value= "500" <?php if (isset($_POST['quantity'])) echo $_POST['quantity']; ?>>500</option>
  </select> </p>
        <p>Double sided
          <INPUT TYPE="radio" NAME="q1" VALUE="yes">
           Single Sided
           <INPUT TYPE="radio" NAME="q1" VALUE="no">
  
        <p>Total: £<?php echo $sum?></p> 
    <p><input type="submit" name="submit" value="Calculate!" /></p>
  <input type="hidden" name="submitted" value="TRUE" />
</form>

 

Is there a way I can make it not reset after you change the value?

 

Thanks,

Josh

[joePHP]

Try this:

 

<form action="calculator.php" method="post">
  <p>Quantity:
       <select name="quantity">
<option value= "100" <?php if (isset($_POST['quantity']) && $_POST['quantity'] == 100) echo 'selected="selected"'; ?>>100</option>
                <option value= "250" <?php if (isset($_POST['quantity']) && $_POST['quantity'] == 250) echo 'selected="selected"'; ?>>250</option>
                <option value= "500" <?php if (isset($_POST['quantity']) && $_POST['quantity'] == 500) echo 'selected="selected"'; ?>>500</option>
  </select> </p>
        <p>Double sided
          <INPUT TYPE="radio" NAME="q1" VALUE="yes">
           Single Sided
           <INPUT TYPE="radio" NAME="q1" VALUE="no">

        <p>Total: £<?php echo $sum?></p>
    <p><input type="submit" name="submit" value="Calculate!" /></p>
  <input type="hidden" name="submitted" value="TRUE" />
</form>

 

Joe

[j05hr]

Thanks Joe

[kratsg]

Actually, you don't need to check if it's set if you're only looking for ONE specific value of it...

 

<form action="calculator.php" method="post">
  <p>Quantity:
       <select name="quantity">
<option value= "100" <?php echo ($_POST['quantity'] == 100)?'selected="selected"':''; ?>>100</option>
                <option value= "250" <?php echo ($_POST['quantity'] == 250)?'selected="selected"':''; ?>>250</option>
                <option value= "500" <?php echo ($_POST['quantity'] == 500)?'selected="selected"':''; ?>>500</option>
  </select> </p>
        <p>Double sided
          <INPUT TYPE="radio" NAME="q1" VALUE="yes">
           Single Sided
           <INPUT TYPE="radio" NAME="q1" VALUE="no">

        <p>Total: £<?php echo $sum?></p>
    <p><input type="submit" name="submit" value="Calculate!" /></p>
  <input type="hidden" name="submitted" value="TRUE" />
</form>

 

Or better yet, if there's a lot of values:

 

<form action="calculator.php" method="post">
  <p>Quantity:
       <select name="quantity">
<?php
$possible_vals = array(100,250,500);
foreach($possible_vals as $value){
     echo "<option value= '$value'";
     if($value == $_POST['quantity']){
          echo ' selected=\'selected\'';
     }
     echo ">$value</option>";
}
?>
  </select> </p>
        <p>Double sided
          <INPUT TYPE="radio" NAME="q1" VALUE="yes">
           Single Sided
           <INPUT TYPE="radio" NAME="q1" VALUE="no">

        <p>Total: £<?php echo $sum?></p>
    <p><input type="submit" name="submit" value="Calculate!" /></p>
  <input type="hidden" name="submitted" value="TRUE" />
</form>