optgroup and $_POST

niconiko · 08-19-2009, 09:28 AM

I cannot retrieve all the values of an optgroup set to multiple.

When I use the following PHP script, I get only one of the multiply-selected optgroup values:

PHP Code:


			
<?php

foreach (array_keys($_POST) as $key) {

$$key = $_POST[$key];

print "$key is ${$key}<br />";

}

?>

The html form script is:

html Code:

<form name="myform" action="process.php" method="POST">

<div align="center">

<select name="Vote101" multiple="multiple" size="5">

  <optgroup label="Swedish Cars">

    <option value="volvo">Volvo</option>

    <option value="saab">Saab</option>

  </optgroup>

  <optgroup label="German Cars">

    <option value="mercedes">Mercedes</option>

    <option value="audi">Audi</option>

  </optgroup>

</select>

</div>

<br><input type="submit" value="Send"><br>

</form>

What I expect to happen is that, if someone selects "Volvo" and "Audi", then, when rerieving $_POST, I should see both "Volvo" and "Audi". As it is now, the PHP print command is only returning "Audi".

Thank you.

ModNote: read, Prettifying Pasted Code on TalkPHP Thank you

sketchMedia · 08-19-2009, 10:02 AM

change the name of the select to Vote101[], this will make PHP process it as an array.

also

PHP Code:


			
foreach (array_keys($_POST) as $key) {
$$key = $_POST[$key];
print "$key is ${$key}<br />";
}

can be done like so:

PHP Code:


			
foreach($_POST as $key => $val)
{
     echo $key .' is: ' . $val  . '<br />';
}

But now you will have arrays in each of the opts so:

PHP Code:


			
    echo 'Vote101 is: <br />';
    foreach($_POST['Vote101'] as $opt)
    {
        echo $opt . '<br />';
    }

should do it.

niconiko · 08-19-2009, 11:05 AM

Thank you sketchMedia.

If I can impose a bit more...

I tried combining the two foreach structures thus:

PHP Code:


			
<?php

foreach($_POST as $key => $val)

{

if ($val == "Array")

  {

    foreach($_POST['Vote101'] as $opt)

    {

    echo $opt . '<br />';

    }

  } else {

   echo $key .' is: ' . $val  . '<br />';

       }

}

?>

Probably obvious to you, this resulted not in what I expected but in:

Vote100 is: Milk
Vote101 is: Array

I'll try to figure this out on my own, but...