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PHP Calculator Example With Source Code | Basic Calculator in PHP

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By admin
4 Min Read

How can we create a PHP Calculator? By very less coding & following some steps, we can create a basic calculator in PHP. This tutorial is for those people who want to learn PHP & beginner in PHP. If you have good knowledge in PHP you can create this program in less then 10 minutes.

Contents
Preview of Calculator ProgramSource Code Of Simple PHP Calculator Program.{$_POST[‘number1’]} {$_POST[‘operation’]} {$_POST[‘number2’]} equals {$total}

Previously I had shared how to make a calculator with JavaScript? Now at this time, I am sharing the same type of calculator in the PHP platform. Basically, I created this program in PHP If { } statement. The If { } statement of any programming language work like either-or. Know more about PHP If statement. 

I create this program in PHP & Bootstrap. I used bootstrap because I am lazy little bit, Using bootstrap I saved my almost 2-3 minute. First, I had created a form with method="POST" then I added action with the same name of the program file. I had saved this program named calculator.php So, I had placed action="calculator.php" in the form tag. Example:

Then I had created two text input and one option menu using HTML or Bootstrap. Gave the first input name ‘number1‘ and for the second input ‘number2‘. Example: & gave name for selection section. Example:

Preview of Calculator Program

Let’s see a preview of this calculator in GIF version. In other words, see how this calculator works.

php calculator preview

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Source Code Of Simple PHP Calculator Program.

Now here I am sharing the source code of this basic PHP calculator, Who was still talking about. This is a very small program So, I created just one file for this. I am sure you will fully understand the whole program just looking at source code. Because this code is so simple & clean.

Create a file name ‘calculator.php‘ and put these following code given here below. Just Copy & Paste.

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<!DOCTYPE html>

<!— code by webdevtrick ( https://webdevtrick.com) –>

<html>

<head>

<title>Simple Calculator In PHP | Webdevtrick.com</title>

<meta charset=“utf-8”>

<meta http–equiv=“X-UA-Compatible” content=“IE=edge”>

<meta name=“viewport” content=“width=device-width, initial-scale=1”>

<link href=“https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css” rel=“stylesheet”>

</head>

<body>

<div class=“container” style=“margin-top: 50px”>

// If the submit button has been pressed

if(isset($_POST[‘submit’]))

{

// Check number values

if(is_numeric($_POST[‘number1’]) && is_numeric($_POST[‘number2’]))

{

// Calculate total

if($_POST[‘operation’] == ‘plus’)

{

$total = $_POST[‘number1’] + $_POST[‘number2’];

}

if($_POST[‘operation’] == ‘minus’)

{

$total = $_POST[‘number1’] – $_POST[‘number2’];

}

if($_POST[‘operation’] == ‘multiply’)

{

$total = $_POST[‘number1’] * $_POST[‘number2’];

}

if($_POST[‘operation’] == ‘divided by’)

{

$total = $_POST[‘number1’] / $_POST[‘number2’];

}

// Print total to the browser

echo “

{$_POST[‘number1’]} {$_POST[‘operation’]} {$_POST[‘number2’]} equals {$total}

“;

} else {

// Print error message to the browser

echo ‘Numeric values are required’;

}

}

// end PHP. Code by webdevtrick.com

?>

    <!— Calculator form by webdevtrick.com —>

    <form method=“post” action=“calculator.php”>

        <input name=“number1” type=“text” class=“form-control” style=“width: 150px; display: inline” />

        <select name=“operation”>

         <option value=“plus”>Plus</option>

            <option value=“minus”>Minus</option>

            <option value=“multiply”>Multiply</option>

            <option value=“divided by”>Devide</option>

        </select>

        <input name=“number2” type=“text” class=“form-control” style=“width: 150px; display: inline” />

        <input name=“submit” type=“submit” value=“Calculate” class=“btn btn-primary” />

    </form>

</div>

</body>

</html>

Now you have successfully created this program. now time to understand this program, look at the code you will definitely understand. I also placed a comment on every section of codes. If you have any doubt or question comment down below.

Thanks For Visiting, Keep Visiting.

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