PHP Example
Screen shot
selecting multiple values from a dropdownlist

<?php
if(isset($_POST[\'btn\'])){
 if(isset($_REQUEST[\'menu\'])){
  $menu=$_REQUEST[\'menu\'];
   foreach($menu as $key=>$value){
      if(is_array($value)){
          foreach($value as $item){
              echo $item.\"<br>\";
          }
      }
             
      else{
         echo $value.\"<br>\";
       }
    }
  }
  else{
     echo \"please select any option\";
  }
 }
?>
     <html>
     <head>
     <title>PHP Example</title><br>
     <body>
    <form name=\"frm\" action=\"multiple_dropdown.php\" method=\"post\">
    <b>Select your favorite ice_cream flavour(s)</b><br>
     <select name=\"menu[]\" multiple>
     <option value=\"ice cream\">ice cream</option>
     <option value=\"coffee\">coffee</option>
     <option value=\"tea\">tea</option>
     <option value=\"beverage\">beverage</option>
     <option value=\"cold coffee\">cold coffee</option>
     </select><br>
     <input type=\"submit\" name=\"btn\" value=\"submit\" />
     </form>
     </body>
     </html>

\"\"

You can download source code here