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1	✅ Concept of Cookies in PHP
2	Cookies in PHP are small files stored on the client’s browser. They are used to store data (like usernames, preferences, etc.) and send it back to the server with each request. Cookies help maintain stateful information across different pages of a website.
3
4	⚙️ How Cookies Work in PHP
5	PHP provides the setcookie() function to create cookies.
6
7	You must call setcookie() before any output is sent to the browser.
8
9	You can retrieve cookies using the $_COOKIE superglobal.
10
11	📝 Syntax of setcookie()
12
13	setcookie(name, value, expire, path, domain, secure, httponly);
14	✅ PHP Script to Set and Retrieve a Cookie
15	🔹 1. Set Cookie (set_cookie.php)
16
17	<?php
18	// Set a cookie named 'user' with value 'John Doe' that expires in 1 hour
19	setcookie("user", "John Doe", time() + 3600); // 3600 seconds = 1 hour
20	?>
21
22	<!DOCTYPE html>
23	<html>
24	<head>
25	<title>Set Cookie</title>
26	</head>
27	<body>
28	<h2>Cookie has been set successfully.</h2>
29	<a href="get_cookie.php">Click here to view the cookie value</a>
30	</body>
31	</html>
32	🔹 2. Get Cookie (get_cookie.php)
33
34	<?php
35	// Check if the 'user' cookie is set
36	if (isset($_COOKIE["user"])) {
37	$user = $_COOKIE["user"];
38	} else {
39	$user = "Cookie named 'user' is not set.";
40	}
41	?>
42
43	<!DOCTYPE html>
44	<html>
45	<head>
46	<title>Get Cookie</title>
47	</head>
48	<body>
49	<h2>Cookie Value:</h2>
50	<p><?php echo $user; ?></p>
51	</body>
52	</html>