PHP AdvancedLesson 36Free preview

PHP Cookies

This lesson is part of PHP · All levels

Summary

A cookie is a small piece of data stored in a visitor's browser and sent back to the server at each request. This lesson discusses how to make cookies with setcookie(), read them through $_COOKIE, and set their running time. Cookies are useful for preferences, but not for sensitive data.

Key points

Cookies are stored in the visitor's browser, not on the server
Setcookie() must be called before sending any output
The cookie value is read through superglobal $_COOKIE
Each cookie should be given a clear expiration date.

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