Php update session data

Types of Computer Networks. Classical Synchronization Problem. What are Semaphores? To store information accessible accross web pages, we use sessions.

Session is not stored on the user browser like Cookies , hence it is a more secure option. As we know HTTP is a stateless protocol, if a user visits a webpage and perform some action, there is no way to remember what he did when the user navigates to the next webpage.

Let's take a practical example, when you log into your facebook account, by providing your email address and password, until and unless you logout, the web application remembers who you are and display what your friends are posting and liking on your News Feed, you can update your profile, send someone message, join a group etc, this is accomplished by Session.

When a user logs into their account on any web application, a session is created for them, and in the session their username or userid or some other unique identifier is stored, which is then used on the consecutive webpages to show information specific to that user. On logout, the session is destroyed. Session is not limited by any size limit, you can store any information in the session, irrespective of its size.

Before we move on to how to start, update and end a session in PHP, let's learn a few realworld use of session. In the code above, we have started a session and set two session variables. If there are too many values stored in the session, and you don't know which one do you want to get, you can use the below code to print all the current session variable data. We just updated the value of userid in the session variable from 1 to We use these functions on pages like logout or checkout in case of an eCommerce website to clean the session variable off the user specific data and to eventually destroy the current session.

Learn CSS. Learn JavaScript. Currently, the session only seems to store the initial value, but not any updates to it.

So if a user enters "John" as the first name and then later goes back and changes it to "Frank," "John" is the name stored. It's not required to unset the session when you want to change because you are working at the same memory address. Because same variable might be in use at different pages, and under processing and so changing values will be unacceptable.

The possible solution is. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. How to update a session variable Ask Question. Asked 10 years, 7 months ago. Active 1 year ago. Viewed 13k times. I have a form in php that allows users to edit their user profile after the user logs in.

It is prefilled with the users current info and when it is submitted, it updates the database. However, when it returns to the edit user profile page, the prefilled text is not updated. It only seems to update when the user re-logins. We're a friendly, industry-focused community of developers, IT pros, digital marketers, and technology enthusiasts meeting, learning, and sharing knowledge. You're trying to visit a URL that doesn't currently exist on the web.

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