PHP creating cookies setting and deletingCookies are used by web sites to store information about the visitor at the local computer ( User end ) through the browser.
The difference between session and cookies is the cookies are stored at client computer and the sessions are stored at server side.
Sending cookies by setcookie
Example 1 : Setting the cookiesWe will see how to add the cookies first. You can download the free code at the end of this page for your testing. You can use the demo here also. Here is the code to do that.
The above line will set the cookie with the variable value set to a string. This will expire after one hour as the time of expire is set to one huour ( +3600 seconds ) after the current time.
We have used time() to get the present time value ( ( time elapsed between current time and Unix Epoch (January 1 1970 00:00:00 GMT) in seconds ) and then added the expire time of the cookies in seconds.
Two things we have to know here.
1. Cookie set by the page now will be available at next page.
2. Before sending any header to the browser ( before sending any html code ) the cookie has to be set. Otherwise error message we will get.
Reading cookiesTo read the cookie we can check the value as a variable or by using the code below.
In PHP 5 and above it is
Delete CookiesSame way to delete the cookies we will set the same cookie again with expire time one hour before by using time()-3600 . That will delete the cookie from the computer.
This will delete the cookie.
Advantage of CookiesBetter user experience : Site can store user preference or choice of options through cookies over a period so the visitor need not have to start from scratch.
NOTE : Sensitive information should not be stored by using Cookies
Browser settingsThe user have full control over the cookies it want to store or not and for what level it wants to store. The browser setting for the cookies can be managed by going to
Unlike sessions cookies are managed by users through its web browser so we have to carefully select which data to be used through cookies.
Storing PHP array data in cookiesWe can create an array and store it as cookie. Read the array data to display and destroy the data.
This article is written by plus2net.com team.
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