Changes

== What is a PHP Session? ==

PHP Sessions allow web pages to be treated as a group, allowing variables to be shared between different pages. One of the weaknesses of cookies is that the cookie is stored on the user's computer (and by user we mean the person with the browser visiting your web site). This provides the user the ability to access, view and modify that cookie for potentially nefarious purposes. PHP sessions, on the other hand, store only an ID cookie on the user's system which is used to reference the session file on the server. As such, the user has no access to the content of the session file, thereby providing a secure alternative to cookies. PHP sessions also work when the user has disabled the browser's cookie support. In this situation it includes the session ID information in the web page URLs.