• Cookies are small text files that are used by a Web server to keep track of users.


• A cookie has value in the form of name-value pairs.


• Getting a cookie means using the name to retrieve the value.

Create a Cookie

setCookie() :This function is used to set a cookie.

Syntax :

setcookie(name, value, expire, path, domain);

Argument	Type	Description
name	string	Name of Cookie.
value	string	Value to store in cookie
expire	int	Specifies the duration when this cookie should expire.
path	string	page within the Web root folder would see this named cookie
domain	string	no check is made against the domain requested by the client.
secure	int (0 or 1)	If it is 1,the cookie will only be sent over a secure socket layer or default to set 0.

Example :

<?php
setcookie("user", "techknowheights", time()+3600);
?>

Note: In above example cookie name is user,value is tecknowheights,cookie should expire after 1 hour.

Retrieve a Cookie Value

A variable $_COOKIE is used to retrieve a cookie value.

Example :

<?php
setcookie("user", "techknowheights", time()+3600);
?>

<?php
echo $_COOKIE["user"];  // view only one cookie

echo "<br>";
print_r($_COOKIE);     //to view all cookies
?>

Output :

techknowheights
Array ( [user] => techknowheights ) 

Delete the Cookie

It is very easy to delete the cookie and should give expiration date in the past.

Example :

<?php
setcookie("user", "", time()-3600); 
?>