PHP program to create a Simple Calculator:
The below program is to create a Simple Calculator in PHP.
Example
<!DOCTYPE html
>
<html
>
<body
>
<?php
ini_set
('display_errors',
0);
if( isset
( $_REQUEST
['calculate'] ))
{
$operator
=$_REQUEST
['operator'];
$n1
= $_REQUEST
['first_value'];
$n2
= $_REQUEST
['second_value'];
if($operator
=="+")
{
$res
= $n1
+$n2
;
}
if($operator
=="-")
{
$res
= $n1
-$n2
;
}
if($operator
=="*")
{
$res
=$n1
*$n2
;
}
if($operator
=="/")
{
$res
= $n1
/$n2
;
}
if($_REQUEST
['first_value']==NULL || $_REQUEST
['second_value']==NULL)
{
echo
"<script language=javascript> alert(\"Please Enter Correct values.\");</script>";
}
}
?>
<form
>
<table style
="border:groove #00FF99">
<tr
>
<td style
="background-color:turquoise; color:black; font-family:'Times New Roman'">Enter Number
</td
>
<td colspan
="1">
<input name
="first_value" type
="text" style
="color:red"/></td
>
</tr
>
<tr
>
<td style
="color:red; font-family:'Times New Roman'">Select Operator
</td
>
<td
>
<select name
="operator" style
="width: 63px">
<option
>+</option
>
<option
>-</option
>
<option
>*</option
>
<option
>/</option
>
</select
></td
>
</tr
>
<tr
>
<td style
="background-color:turquoise; color:black; font-family:'Times New Roman'">Enter Number
</td
>
<td
class="auto-style5">
<input name
="second_value" type
="text" style
="color:red"/></td
>
</tr
>
<tr
>
<td
></td
>
<td
><input type
="submit" name
="calculate" value
="Calculate" style
="color:wheat;background-color:rosybrown" /></td
>
</tr
>
<tr
>
<td style
="background-color:turquoise;color:black">Output
= </td
>
<td style
="color:darkblue"><?php echo $res
;?></td
>
</tr
>
</table
>
</form
>
</body
>
</html
>