A function to build a basic dynamic dropdown menu.

<?php

/*
 * Dynamic Dropdown Menu
 * by da^hype (shahir reza ali)
 * www.codedb.org
 * 12/10/2006
 *
 * $fieldname = Name of the field
 * $array =  An associative array.
 * $firstentry = First option in dropdown
 * $lastentry = Last option in dropdown
 * $onchange = $onchange designates a JavaScript to run when the user chooses one of the options.
 * $selectedkey = Default selected item
 *
 * Example:
 * $_array = array('1'=> 'one', '2'=> 'two', '3'=> 'three');
 *  echo create_dropdown("numbers", $_array, "Select One", "Dont Know..", FALSE, 2);
 *
 */
function create_dropdown($fieldname, $array, $firstentry = FALSE, $lastentry = FALSE, $onchange = FALSE, $selectedkey = " ")
 {
   $dropdown = ($onchange != FALSE) ? '<select size=1 name="'.$fieldname.'" onchange="'.$onchange.'">' :
                '<select size=1 name="'.$fieldname.'">';

   if ($firstentry != FALSE) //if $firstentry is not FALSE, set one!!!
       $dropdown .= '<option value="0">'.$firstentry.'</option>';

   foreach($array AS $value => $name) //loop threw array to create the menu
   {
        $dropdown .= ($value == $selectedkey) ?
                      '<option value="'.$value.'" selected="'.$selectedkey.'">'.$name.'</option>' :
                      '<option value="'.$value.'">'.$name.'</option>';
   }

   if ($lastentry != FALSE) //if $lastentry is not false, set one!!!
       $dropdown .= '<option value="-1">'.$lastentry.'</option>';

   $dropdown .= '</select>';

  return $dropdown;  //return the dropdown menu
}

?>