bunu şu kodda nasıl kullanabilirim;

<?php
require('config.inc.php');
require('mysql.inc.php');
//require('header.php');

function dateform(){
$month = "";
$monthform = "";

$thismonth = date("M");
$thisyear = date("Y");
$thisday = date("i");

for($i=1;$i<=12;$i++){
// Create our month form.
$month = date("M",mktime(0,0,0,$i,1,date("Y")));
if($month == date("M")){
$monthform .= "<option value='$i' SELECTED>".$month."</option>\n";
}else{
$monthform .= "<option value='$i'>".$month."</option>\n";
}
} $monthform = "<select name='month'>\n".$monthform."</select>\n";

$year = "";
$yearform = "";
for($year=date("Y",mktime(0,0,0,1,1,date("Y")-1));$year<=date("Y",mktime(0,0,0,1,1,date("Y")+2)) ;$year++){
if($year == date("Y")){
$yearform .= "<option SELECTED>".$year."</option>\n";
}else{
$yearform .= "<option>".$year."</option>\n";
}
}$yearform = "<select name='year'>\n".$yearform."</select>\n";

$day = "";
$dayform = "";
for($day=1;$day<=31;$day++){
if($day == date("j")){
$dayform .= "<option SELECTED>".$day."</option>\n";
}else{
$dayform .= "<option>".$day."</option>\n";
}
}$dayform = "<select name='day'>\n".$dayform."</select>\n";

$form = $monthform.$dayform.$yearform;
return $form;
}



if(!isset($_GET['key']) && !isset($_POST['new'])){
include('header.php');
?>

<input type=hidden name=new value=true>
<?=dateform();?>
</form>