hasPostVariable('email'); if ($postVarExists) { $email = eZHTTPTool::instance()->getPostVariable('email'); echo "The email submitted is: " . $email; } ?>In this example, we check if a POST variable with the name "email" has been submitted. If it has, we retrieve the value of the variable using the getPostVariable() method and display it. Package library: eZHTTPTool is a package library that is part of the eZ Publish content management system. It provides a set of tools for handling HTTP requests and responses.