XX.X:
<?XXX version="1.X" encoding="UTF-X"?>
&XX;?xml-XXXXXXXXXX type="XXXX/XXX" href="XXXXXXX.XXX"?&XX;
&XX;cos>
<co&XX;
<id&XX;XXXXX</id>
<XXXX>Computer Organization&XX;/XXXX&XX;
<credit>X&XX;/credit>
&XX;XXXXX>X&XX;/XXXXX>
</co&XX;
<co>
&XX;id>XXXXX</id>
<XXXX>XXX XXXXXXXXXXXX</name&XX;
<XXXXXX&XX;X&XX;/credit>
<level&XX;X</level&XX;
&XX;/co>
</cos>
Answer Q3:
The XXX script for XXX XXXXX-mentioned XXXX XX:
I've added comments wherever necessary. XXXX form XXX been XXXX to take inputs.
<?XXX
XX (isset($XXXXX['submit'])) { //XXXX XXXXXX button XX clicked
$id = $XXXXX['id'];
$name = $_POST['name'];
$email = $XXXXX['email'];
$XXX = array($XXXX, $id, $email); //XXXX XXXX, id XXX email in XXXXX
echo $XXX[0];
echo "&XX;br>";
echo $XXX[1];
echo "<br&XX;";
echo $arr[2];
}
?>
<!XXXXXXX XXXX&XX;
&XX;html&XX;
<XXXX&XX;
<XXXXX&XX;Computer XXXXXXX&XX;/title&XX;
</head&XX;
&XX;body>
<XXXX name="form" XXXXXX="POST" XXXXXX="home.XXX"&XX; &XX;!--XXXX XXX form XXXXXX to XXXX.XXX XXX XXXXXX post--&XX;
&XX;div&XX;
<label>ID: </XXXXX&XX;
&XX;input XXXX="XXXX" XXXX="id" XXXXXXXX&XX;
&XX;/div>
&XX;XX>
&XX;div&XX;
&XX;label>Name: </XXXXX>
&XX;XXXXX XXXX="XXXX" XXXX="XXXX" required&XX;
&XX;/div&XX;
&XX;XX>
&XX;label>Email: </XXXXX&XX;
<input type="email" name="XXXXX" XXXXXXXX>
&XX;/div>
&XX;br>&XX;br>
<div>
&XX;XXXXXX type="XXXXXX" name="XXXXXX">XXXXXX&XX;/XXXXXX&XX;
&XX;div&XX;
</form&XX;
&XX;/body&XX;
&XX;/html&XX;
XXXXX:
Output:
">