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PHP 5 Power Programming by Derick Rethans, Stig Sæther Bakken, Andi Gutmans

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5.6. Cookies

The simple registration we used earlier in this chapter does not make data persistent across requests. If you go to the next page (such as by clicking a link or by entering a different URL in your browser's address bar), the posted data is gone. One simple way to maintain data between the different pages in a web application is with cookies. Cookies are sent by PHP through the web server with the setcookie() function and are stored in the browser. If a time-out is set for the cookie, the browser will even remember the cookie when you reset your computer; without the time-out set, the browser forgets the cookie as soon as the browser closes. You can also set a cookie to be valid only for a specific subdomain, rather than having the ...

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