Building web applications with membership management is one of the most frequent tasks that every programmer does. Managing membership data, such as username, password and the member's profile with sessions in PHP is the easiest and simplest solution, although it is not the only one.
This article contains handful PHP function ae_put_cookie for easy cookie setting and "Cookie Notepad" example which allow visitor to store text in his own browser cookie.
Cookies are simply files stored in a special temporary location determined by your web browser (like Internet Explorer) which allow public information to be stored for your benefit usually. By public information, this can entail any information that you have entered into forms on websites, or certain non-identifying information such as your IP address or user agent.
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