Using the HTML Form is very important in creating a PHP application, because it serves as a holder of information from a website's visitors and then use the PHP to process that information.
Heres the simple HTML Form.
The code below is a simple HTML Form with a two input boxes for Fullname, E-mail Address and a submit button. When the user click the submit button, the data in the form will be sent to the HTTP POST method to be processed in a PHP file called “processData.php”.
<html>
<body>
<h1>Sample HTML Form</h1>
<form action="processData.php" method="post">
FullName:<input type="text" name="fullname"><br>
E
-mail Address
: <input type
="text" name
="email"><br
><input type="submit">
</form>
</body>
</html>
Output:

Code for processData.php:
<?php
echo 'Your Fullname is: '.$_POST['fullname'];
echo '<br/>';
echo 'Your Email address is: '.$_POST['email'];
?>
The code above will simply display the data that has been passed from HTML Form using the superglobal ”$_POST[]” variable. And the output of this application looks like as shown below:
Your Fullname is: Joken Villanueva