jika anda ingin membuat nya seperti di bawah ini
<html>
<head>
<title>Multiple drop down list dengan php </title>
<SCRIPT language=JavaScript>
function reload(form)
{
var val=form.cat.options[form.cat.options.selectedIndex].value;
self.location='untitled-1.php?cat=' + val ;
}
</script>
</head>
<body>
<?php
$cat=$_GET['cat'];
if($cat=="liga inggris")
{
$z="<select name='subcat'>
<option value='arsenal'>arsenal</option>
<option value='chelsea'>chelsea</option>
<option value='manchester'>manchester united</option>
</select>";
}
if($cat=="liga italia")
{
$z= "<select name='subcat'>
<option value='intermilan'>inter milan</option>
<option value='milan'>milan</option>
<option value='juventus'>juventus</option>
</select>";
}
if($cat=="")
{
$z= "<select name='subcat'disabled>
<option value='' > pilih liga</option>
</select>";
}
echo " <form method=post name=f1 action='dd-check.php'>
<select name='cat' onchange='reload(this.form)'>
<option value=''>Select one</option>
<option value='liga inggris' >liga inggris</option>
<option value='liga italia' >liga italia</option>
</select>
<br>
$z
<input type=submit value=Submit></form> ";
?>
</body>
</html>
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