$email = CRM_Utils_Request::retrieve('email', 'String');
$first_name = CRM_Utils_Request::retrieve('first_name', 'String', $this, true);
$params = array('first_name', 'last_name', 'email'); $values = CRM_Utils_Request::retrieveMultiple($params, 'String', $this);This example retrieves multiple POST parameters, specified as an array. The second parameter is the type of the parameter, and the third parameter specifies the current object. These are just a few examples of how the CRM_Utils_Request class can be used to handle HTTP requests in PHP. This package library provides a convenient and reliable way to handle the various types of data transferred between client and server.