[RESOLVED] parse drop down value with superglobal

[paldo]

Hallo helpers

I have a simple drop down menu that pass a value to a php script. If, from this script, I return to the previous page I want the selected value to be displayed again.

here the form: order_form_select.php

<?php
session_start();
echo "<form name=\"aaaa\" method=\"post\"  action=\"order_select.php\">";
echo '<select name="quantity1"> 
<option value="0" >0  </option> 
<option value="6">6  </option>
<option value="12">12</option> 
<option value="18">18</option> 
</select> 
 item1 for 10$<br/><br />'."\n";


echo '<input name="submit" type="submit" value="order">';
print '</form>';

?>

I have learned from a previous thread that I have to use superglobal:something like
htmlspecialchars($_POST["quantity1"], but I do not know where to place it in the script and how.

Here the script: order_select.php

<?php
session_start();
$_SESSION['quantity1'] = $_POST['quantity1'];

?>
<?php
$quantity1 = $_POST['quantity1'];

print "you ordered $quantity1  item1 .<br />";

?>

<input type="submit" name="submit" style="background-color:#00CC66" value="  I confirm my order" onClick="location.href='confirm.php'">

<input type="submit" name="submit" style="background-color:#FF0000" value="  I change my order" onClick="location.href='order_form_select.php'">

Thanks for your precious help.

[NogDog]

echo "<select name='quantity1'>\n";
$quantity = isset($_POST['quantity']) ? (int) $_POST['quantity'] : 0;
for($ix=0; $ix<=18; $ix+=6)
{
   printf(
      "<option value='&#37;d'%s>%d</option>\n",
      $quantity,
      ($ix == $quantity) ? " selected='selected'" : '',
      $quantity
   );
}
echo "<select>\n";

[djjjozsi]

you should build a function to make a list box:

<?php

function select( $name , $values )
{
    echo "<select name=\"$name\">\n";
    foreach( $values AS $val ) {
        if ( isset( $_POST["$name"] ) AND $_POST["$name"] == $val )
            $selected = " selected=\"selected\"";
        else
            $selected = "";

    echo "\t<option value=\"$val\"$selected>$val</option>\n";
} 
print "</select>\n";
} 


select( "quantity1" , array( 0, 6, 12, 18 ) );

?>

[paldo]

I change the form script as follow:

<?php

session_start();
echo "<form name=\"aaaa\" method=\"post\"  action=\"order_select.php\">";

function select( $quantity1 , $values )
{
    echo "<select name=\"$quantity1\">\n";
    foreach( $values AS $val ) {
        if ( isset( $_POST["$quantity1"] ) AND $_POST["$quantity1"] == $val )
            $selected = " selected=\"selected\"";
        else
            $selected = "";

    echo "\t<option value=\"$val\"$selected>$val</option>\n";
}
print "</select>\n";
}



select( "quantity1" , array( 0, 6, 12, 18 ) ) ;

echo 'item1</br></br><input name="submit" type="submit" value="order">';
print '</form>'

?> 

And the order_select.php script as follow:

<?php
session_start();
$_SESSION['quantity1'] = $_POST['quantity1'];
$_SESSION['value'] = $_POST['value'];

?>
<?php
$quantity1 = $_POST['quantity1'];
$value = $_POST['value'];

print "you ordered $quantity1  item1 .<br />";






?>

<input type="submit" name="submit" style="background-color:#00CC66" value="  I confirm my order" onClick="location.href='confirm.php'">

<input type="submit" name="submit" style="background-color:#FF0000" value="  I change my order" onClick="location.href='order_form_select.php'">

When I return to the form the value is set to 0 (zero) and not to the privious selected value. What about the superglobal? I don't need it?

Thanks

[djjjozsi]

i forget to mention that you should use $SESSION instead of $POST inside the function, if you want to re-load previously selected values from saved session.

as you can see, the index name inside the function called $index declarated with the function calls.

[paldo]

Thank you, you are of big help, it works. I might have some more questions later.

[djjjozsi]

your welcome,

don't forget to set this thread as resolved.

hello,jjozsi.