The PHP $_POST is a PHP superglobal which is used to collect form data after submitting an HTML form using method="post". In the following example, we will use the $_POST superglobal to collect a value.

htmlentities() Function: The htmlentities() function is an inbuilt function that is used to transform all characters which are applicable to HTML entities.

Example:

<?php
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    $name = htmlspecialchars($_REQUEST['fname']); // Collecting Value
    if (empty($name)) {
        echo "Empty Name";
    } else {
        echo $name;
    }
}
?>