How to make a php calculator

Create a PHP calculator with an example: learn how to code a basic calculator & use it to perform simple math operations.

Creating a Simple Calculator with PHP

Creating a calculator using PHP is a great way to learn the basics of the language. With a few simple lines of code, you can create a basic calculator that can perform basic mathematical functions. In this tutorial, we'll show you how to create a simple calculator using PHP.

Step 1: Create the HTML Form

The first step in creating a calculator with PHP is to create the HTML form. This is the form that will take user input and send it to the server. The form should contain two input fields: one for the first number and one for the second number. It should also contain a submit button to send the form.


<form action="calculator.php" method="post">
    <input type="text" name="num1">
    <input type="text" name="num2">
    <input type="submit" value="Calculate">
</form>

Step 2: Get the User Input

The next step is to get the user input from the form. This can be done using the $_POST array. We can assign the two input fields to two separate variables:


$num1 = $_POST['num1'];
$num2 = $_POST['num2'];

Step 3: Perform the Calculation

Now that we have the user input, we can perform the calculation. We can use the +, -, *, and / operators to perform the calculation:


$result = $num1 + $num2;

Step 4: Display the Result

The final step is to display the result of the calculation. We can do this using the echo function:


echo "The result is: $result";

And that's it! We now have a simple calculator that can perform basic mathematical functions. Of course, you can extend this example to add more features and make the calculator more powerful.

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