PHP - Pass Drop Down List option through query string

Question

I have a drop down list that has options that need to be passed through a query string. How would I go about doing this? Also, would anyone be able to list a way to do this both using a button and without using a button? Thank you!

Answer 1

<form method="get">
<select multiple="multiple" name="things[]">
...
</select>
<input type="submit" value="submit"/>
</form>

<?php    
if(isset($_GET['things'])) {
    foreach($_GET['things'] as $thing) {
       echo $thing . '<br />';
    }
}
?>

Answer 2

Without a button:

<form method="get">
<select multiple="multiple" name="things[]" onchange="this.form.submit()">
...
</select>
</form>

Answer 3

Based on Jani's response, are you wanting to have the form submit without a button but still have a backup button if the user doesn't have javascript? You can use noscript to cover that:

<form action="script.php" method="get">
     <div>
     <select name="options" onchange="this.form.submit()">
          <option value="1">1</option>
          <option value="2">2</option>
          <option value="3">3</option>
     </select>
     <noscript>
          <input type="submit" value="Go!" />
     </noscript>
     </div>
</form>

Answer 4

Hi,

I want to filter the database value using the dropdown list option, how to proceed in php.