Curriculum

PHP Basic

PHP Intro

0/1

PHP Install

0/1

PHP Syntax

0/1

PHP Comments

0/2

PHP Variables

0/4

PHP echo / print

0/3

PHP Data Types

0/7

PHP Strings

0/5

PHP Numbers

0/2

PHP Casting

0/1

PHP Math

0/1

PHP Constants

0/1

PHP Magic Constants

0/1

PHP Operators

0/1

PHP if...Else...Elseif

0/5

PHP switch

0/1

PHP Loops

0/7

PHP Functions

0/6

PHP Arrays

0/11

PHP Superglobals

0/7

PHP RegEx

0/1

PHP Form

0/9

PHP Advanced

0/15

PHP OOP

0/14

MySQL Database

0/14

PHP XML

0/5

PHP Reference

0/276

Text lesson

$_REQUEST

$_REQUEST is a PHP superglobal variable that holds submitted form data along with all cookie data.

In essence, it is an array that combines data from $_GET, $_POST, and $_COOKIE.

You can access this data using the $_REQUEST keyword followed by the name of the form field or cookie, like this:

$_REQUEST['firstname']

Using $_REQUEST on $_POST Requests

POST requests typically involve data submitted from an HTML form.

Here’s an example of what an HTML form might look like:

HTML form

<html>
<body>

<form method="post" action="demo_request.php">
  Name: <input type="text" name="fname">
  <input type="submit">
</form>

</body>
</html>

When a user clicks the submit button, the form data is sent to a PHP file specified in the action attribute of the <form> tag.

In that PHP file, we can use the $_REQUEST variable to retrieve the values of the input fields.

PHP file

$name = $_REQUEST['fname'];
echo $name;

In the example below, we have combined the HTML form and PHP code within the same PHP file.

Additionally, we have included some extra lines for security.

Example

<html>
<body>


<form method="post" action="<?php echo $_SERVER['PHP_SELF'];?>">
  Name: <input type="text" name="fname">
  <input type="submit">
</form>

<?php
if ($_SERVER["REQUEST_METHOD"] == "POST") {

  $name = htmlspecialchars($_REQUEST['fname']);
  if (empty($name)) {
    echo "Name is empty";
  } else {
    echo $name;
  }
}

?>


</body>
</html>