I have a php project and what I need is to define a unique session id for each user entering the site and store an array in it, and then print the array to the screen. For example, in a 24-hour session, when the same user enters the site during the day, the same array will be printed, but when the session is over, the array will be emptied. How can i do that ?

Should I use fingerprint js library or is it solved with php session? If it is solved with php session, will it be a security vulnerability? Thanks in advance.

CodePudding user response：

You can use PHP sessions to store an array of data for each user visiting your website. A session ID will be automatically generated for each user, and you can use this ID to store and retrieve data specific to that user.

Start the session using the session_start() function at the top of your PHP script. This will start a new session or resume an existing one.

session_start();

Create an array of data that you want to store for the user. You can store any data you want, such as user preferences or shopping cart items.

$data = array("item1", "item2", "item3");

Store the array in the session by assigning it to a variable with the $_SESSION superglobal.

$_SESSION["data"] = $data;

To print the array to the screen, you can use the print_r() function to display the contents of the array stored in the session.

print_r($_SESSION["data"]);

To empty the array, you can unset the session variable using the unset() function

unset($_SESSION["data"]);

It is safe to use PHP sessions as long as you properly secure your server and your session data. You should always use HTTPS to encrypt the session data and session ID, and configure your server to use secure session settings.

You don't need to use a library such as fingerprint.js, but it is a good practice to use a library that enhances the security by using multiple browser fingerprints to identify the user.