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![How to Retrieve a Cookie Value? <html> <body> <?php if (isset($_COOKIE["user"])) echo "Welcome " . $_COOKIE["user"] . "!<br />"; else echo "Welcome guest!<br />"; ?> </body> </html> Retrieve a value from a cookie called user](https://image.slidesharecdn.com/phpcookies-111226141213-phpapp01/85/PHP-Getting-good-with-cookies-5-320.jpg)
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PHP - Getting good with cookies
Cookies are small files stored on a user's computer that identify the user. PHP allows creation and retrieval of cookie values. To create a cookie, setcookie() must be called before the HTML tag and assigns a name, value, and expiration time. Cookie values are automatically URL encoded when sent and decoded when received. To retrieve a cookie value, check if it is set in the $_COOKIE superglobal array. Cookies can be deleted by setting the expiration time in the past.
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PHP - Getting good with cookies
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- 2. What is Cookies?A cookie is a small file that the server embeds on the user's computer. A cookie is often used to identify a user. Each time the same computer requests a page with a browser, it will send the cookie too. With PHP, you can both create and retrieve cookie values.
- 3. How to Createa Cookie? setcookie(name, value, expire, path, domain); The setcookie() function must appear BEFORE the <html> tag. The value of the cookie is automatically URLencoded when sending the cookie, and automatically decoded when received (to prevent URLencoding, use setrawcookie() instead).
- 4. Example - Cookies<?php setcookie("user", “mni", time()+3600); ?> <html> <body> </body> </html> Create a cookie named user Assign a value to the cookie (user) The cookie will expire in ONE hour
- 5. How to Retrievea Cookie Value? <html> <body> <?php if (isset($_COOKIE["user"])) echo "Welcome " . $_COOKIE["user"] . "!<br />"; else echo "Welcome guest!<br />"; ?> </body> </html> Retrieve a value from a cookie called user
- 6. How to Deletea Cookie? <?php setcookie("user", "", time()-3600); ?> Set the expiration date to ONE hour ago Reset the value of cookie
- 7. Discussion Advantages ofusing cookies Disadvantages of using cookies