PHP Cookies - RMB Scripting

Cookies hold information on your hard drive saved from a website. From passwords to security validation information.

Important:
Remember to include ob_start(); at the top of each page you use cookies on!

How to set a cookie:

PHP:


<?php

ob_start();

$cookievalue = "some value to be stored";

setcookie("COOKIENAME", $cookievalue, time()+600);

?>

The variable "$cookievalue" is the data to be saved in the cookie.
setcookies is the PHP funtion we are going to use.
"COOKIENAME" is the name of the cookie to be save, This could be any thing from "password" to "username".
Then the variable is set as the cookie value.
Then we can set when the cookie will expire. This is in seconds. 600 seconds is 10 minutes.

Now we have set a cookie lets find out how to display it on the page.

Displaying the value of a cookie:

PHP:


<?php

ob_start();

echo $_COOKIE["COOKIENAME"];

?>

echo is to display the value on the page.
Then we tell the code that we want to display a cookie using $_COOKIE to get all the cookies set by the site.
Then we tell what cookie we are looking for in this place it is "COOKIENAME" which you will change to fit your cookie.

Now we have set a cookie lets learn how to delete it.

Deleting a cookie:

PHP:


<?php

ob_start();

setcookie("COOKIENAME", "", time()-600);

?>

The setcookie tells which funtion we would like to use.
"COOKIENAME" is the name of the cookie we would like to delete.
Then the value is set to "" which is nothing. (NULL)
Then we set the time to minus 10 minutes which will make the cookie expire.

Difficulty: Easy
Views: 1266

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