Retrieving Form Data Using the GET Method in PHP

Let's look at an example. Let the file form.php contain a form that is submitted using the GET method to the page result.php:

<form action="/en/result.php" method="GET">
	<input name="test1">
	<input name="test2">
	<input type="submit">
</form>

If we enter some data into our form in the browser and press the button, the form will be submitted to the page result.php:

<?php
	var_dump($_GET);     // array with keys test1 and test2
	var_dump($_POST);    // empty array
	var_dump($_REQUEST); // array with keys test1 and test2
?>

You can also display the contents of a specific input:

<?php
	echo $_GET['test1'];
?>

You can also take the contents of both the first and the second inputs, combine them into a string, and display it:

<?php
	echo $_GET['test1'] . $_GET['test2'];
?>

Create a form with three inputs. Let numbers be entered into these inputs. After submitting the form, display the sum of these numbers.