What is the potential issue with using $HTTP_POST_VARS instead of $_POST in PHP scripts?

Using $HTTP_POST_VARS instead of $_POST in PHP scripts can lead to security vulnerabilities as $HTTP_POST_VARS is deprecated and not recommended for use. To solve this issue, simply replace all instances of $HTTP_POST_VARS with $_POST in your PHP scripts to ensure proper and secure handling of POST data.

// Incorrect usage using $HTTP_POST_VARS
$value = $HTTP_POST_VARS['key'];

// Corrected code using $_POST
$value = $_POST['key'];