PHP setrawcookie() Function: Everything You Need to Know
As a PHP developer, you may need to set raw cookies for your web application to store information on the client side. The setrawcookie() function is a built-in PHP function that allows you to set a raw cookie. Unlike the standard setcookie() function, setrawcookie() does not URL-encode the cookie value, making it useful when you need to store pre-encoded data or binary strings. In this article, we will take an in-depth look at the setrawcookie() function and its usage.
What is the setrawcookie() Function?
The setrawcookie() function is a PHP built-in function (available since PHP 5.2.0) that allows you to set a raw cookie on the client side. It returns true on success and false on failure.
How to Use the setrawcookie() Function
Using the setrawcookie() function is straightforward. Here is the syntax:
PHP Syntax
setrawcookie($name, $value, $expire, $path, $domain, $secure, $httponly);The function accepts seven parameters:
$name: The name of the cookie.$value: The raw value of the cookie (not URL-encoded).$expire: The expiration time as a Unix timestamp.$path: The server path where the cookie will be available.$domain: The domain where the cookie will be available.$secure: Whether the cookie should only be transmitted over HTTPS.$httponly: Whether the cookie should be inaccessible to client-side JavaScript.
Here is an example of how to use the setrawcookie() function to set a raw cookie:
Example
<?php
$name = "username";
$value = "john";
$expire = time() + (86400 * 30); // 30 days
$path = "/";
$domain = ".example.com";
$secure = true;
$httponly = true;
setrawcookie($name, $value, $expire, $path, $domain, $secure, $httponly);In this example, we use the setrawcookie() function to set a raw cookie named username with the value john. We specify the expiration time as 30 days from the current time, the server path as /, and the domain as .example.com. The secure and httponly flags are set to true to ensure the cookie is only transmitted over HTTPS and is inaccessible to client-side JavaScript.
setrawcookie() vs setcookie()
The main difference between setrawcookie() and setcookie() is how they handle the cookie value. setcookie() automatically URL-encodes the value using rawurlencode(), which is safe for standard text but can cause issues if you need to store pre-encoded data or binary strings. setrawcookie() skips this encoding step, giving you full control over the raw value. For most standard use cases, setcookie() is preferred, but setrawcookie() is essential when working with already-encoded data.
Conclusion
The setrawcookie() function is a useful tool for setting raw cookies in your PHP web application. By understanding its syntax, parameters, and how it differs from setcookie(), you can safely store pre-encoded data on the client side.
Practice
What is the correct usage of the setrawcookie() function in PHP?