1. Write a PHP program to create a simple
calculator that can accept two numbers and perform operations like add,
subtract, multiplication and divide (using Self Processing form).
<html>
<body>
<FORM ACTION="<?php
$_SERVER['PHP_SELF']; ?>" method="POST">
<table>
<tr><td><h3>Enter
first no :</td><td><input type=text name=no1 ></h3></td></tr>
<tr><td><h3>Enter
second no :</td><td><input type=text name=no2></h3></td></tr>
<tr><td><b>Select
Operation which u have to perform :</b></td>
<td><select
name=cal>
<option
value="1">Addition</option>
<option
value="2">Substraction</option>
<option
value="3">Multiplication</option>
<option
value="4">Division</option>
</select></td></tr>
<tr><td></td><td><input
type=submit name=submit value=Calculate></td></tr>
</table>
</form>
</body>
</html>
<?php
if(isset($_POST['submit']))
{
$no1=$_POST['no1'];
$no2=$_POST['no2'];
$cal=$_POST['cal'];
if((!empty($no1))
&& (!empty($no2)))
{
switch($cal)
{
case
1:$add=$no1+$no2;
echo
"<h1>addition=".$add."</h1>";
break;
case
2:$sub=$no1-$no2;
echo
"<h1>subtraction=".$sub."</h1>";
break;
case
3:$mult=$no1*$no2;
echo
"<h1>multiplication=".$mult."</h1>";
break;
case
4:$div=$no1/$no2;
echo
"<h1>division=".$div."</h1>";
break;
}
}
else
echo "<b>Please enter both 2 nos</b>";
}
else
die("not
able to acccess");
?>
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