In this tutorial I wrote this program to ask the user to give two numbers and then the program will performed addition, subtraction, multiplication, and division using PHP programming language.
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Program Listing
index.php
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Basic Math Operations in PHP</title>
<style>
body {
background: #f1f1f1;
font-family: arial;
size : 16px;
}
form {
background-color: rgba(0, 0, 0, 0.7);
color: #000;
padding: 50px;
position: absolute;
-webkit-transform: translate(-50%, -50%);
transform: translate(-50%, -50%);
left: 50%;
top: 50%;
}
.row {
display: block;
font-size: 0;
margin-bottom: 18px;
}
h1,h2 {
color: #fefefe;
text-align: center;
margin: 0 0 40px 0;
}
.row label {
width: 180px;
color: #fefefe;
text-transform: uppercase;
padding-left: 0!important;
}
.row input,
.row textarea {
background-color: #fefefe;
width: 280px;
color: #000000;
}
.row textarea {
resize: none;
}
.row label,
.row input,
.row textarea {
vertical-align: top;
display: inline-block;
border: 0;
margin: 0;
padding: 15px;
font-size: 15px;
}
form button {
background-color: #16222A;
width: 250px;
display: inline-block;
border: 0;
padding: 15px;
color: #fefefe;
font-size: 15px;
text-transform: uppercase;
cursor: pointer;
}
form #btnClear {
background-color: #486980;
}
input:focus,
select:focus,
textarea:focus,
button:focus {
outline: none;
}
</style>
</head>
<body>
<?php
error_reporting(0);
$num1 = $_POST['txtFirstNum'];
$num2 = $_POST['txtSecondNum'];
if(isset($_POST['submit'])) {
$addition = ($num1 + $num2);
$subtraction = ($num1 - $num2);
$multiplication = ($num1 * $num2);
$division = ($num1 / $num2);
}
if(isset($_POST['clear'])) {
$num1 = "";
$num2 = "";
$addition = "";
$subtraction = "";
$multiplication = "";
$division = "";
}
?>
<form action="" method="post">
<h1>Basic Math Operations in PHP</h1>
<div class="row">
<label for="txtFirstNum">Give First Number</label>
<input type="text" name="txtFirstNum" id="txtFirstNum"
value="<?php echo $num1; ?>" autofocus>>
</div>
<div class="row">
<label for="txtSecondNum">Give Second Number</label>
<input type="text" name="txtSecondNum" id="txtSecondNum"
value="<?php echo $num2; ?>">>
</div>
<div class="row">
<label for="txtAddition">Addition</label>
<input type="text" name="txtAddition"
value="<?php echo $addition; ?>" readonly>
</div>
<div class="row">
<label for="txtSubtraction">Subtraction</label>
<input type="text" name="txtSubtraction"
value="<?php echo $subtraction; ?>" readonly>
</div>
<div class="row">
<label for="txtMultipy">Multiplication</label>
<input type="text" name="txtMultipy" "
value="<?php echo $multiplication; ?>" readonly>
</div>
<div class="row">
<label for="txtSixthNum">Division</label>
<input type="text" name="txtDivision" id="txtSixthNum"
value="<?php echo $division; ?>" readonly>
</div>
<div classs="row">
<button type="submit" name="submit"
id="btnCompute">Compute</button>
<button type="submit" name="clear"
id="btnClear">Clear</button>
</div>
</form>
</body>
</html>
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