Cookie – PHP Advanced

Its a small file that server insert on user’s computer. When the same computer requests a page with a browser, it will send cookie too. You can create and retrieve cookie values here in PHP.

Create Cookies

setcookie() function is used to create a cookie.

//cookies syntax
setcookie(name, value, expire, path, domain, secure, httponly);

Following code creates a cookie named “cust” with value “Code Projects” & after 30 days cookie will expire. “/” means that cookie is available in entire website.

<!DOCTYPE html>
 <?php
 $cookie_name = "cust";
 $cookie_value = "Code Projects";
 setcookie($cookie_name, $cookie_value, time() + (86400 * 30), "/"); // 1 day = 86400
 ?>
 <html>
 <body>

<?php
 if(!isset($_COOKIE[$cookie_name])) {
 echo "Cookie Named '" . $cookie_name . "' is not set!";
 } else {
 echo "Cookie '" . $cookie_name . "' is set!<br>";
 echo "Value is: " . $_COOKIE[$cookie_name];
 }
 ?>

<p><b>NOTE:</b> To see the value of cookie RELOAD the page if value of cookie is not shown.</p>
</body>
</html>

Output :

Modifying Cookie Value

To modify cookie value just set the value again.

<!DOCTYPE html>
 <?php
 $cookie_name = "cust";
 $cookie_value = "Johnny";
 setcookie($cookie_name, $cookie_value, time() + (86400 * 30), "/");
 ?>
 <html>
 <body>

<?php
 if(!isset($_COOKIE[$cookie_name])) {
 echo "Cookie Named '" . $cookie_name . "' is not set!";
 } else {
 echo "Cookie '" . $cookie_name . "' is set!<br>";
 echo "Value is: " . $_COOKIE[$cookie_name];
 }
 ?>

<p><b>Note:</b> To see the value of cookie RELOAD the page if value of cookie is not shown.</p>
</body>
</html>

Output :

Deleting Cookie

Use setcookie( ) function with past expiration date to delete cookie

<!DOCTYPE html>
 <?php
 // set the expiration date to one hour ago
 setcookie("user", "", time() - 3600);
 ?>
 <html>
 <body>

<?php
 echo "Cookie 'user' is deleted.";
 ?>

</body>
 </html>

Output :

Check if Cookies are Enabled

<!DOCTYPE html>
 <?php
 setcookie("ex_cookie", "test", time() + 3600, '/');
 ?>
 <html>
 <body>

<?php
 if(count($_COOKIE) > 0) {
 echo "Cookies are enabled.";
 } else {
 echo "Cookies are disabled.";
 }
 ?>

</body>
 </html>

Output :