What are Cookies? A cookie is a small file with the maximum size of 4KB that the web server stores on the client computer. They are typically used to keeping track of information such as a username that the site can retrieve to personalize the page when the user visits the website next time.
Cookies are a mechanism for storing data in the remote browser and thus tracking or identifying return users. You can set cookies using the setcookie() or setrawcookie() function. Cookies are part of the HTTP header, so setcookie() must be called before any output is sent to the browser.
A session is a way to store information (in variables) to be used across multiple pages. Unlike a cookie, the information is not stored on the users computer.
Accessing Cookies Values
The PHP $_COOKIE superglobal variable is used to retrieve a cookie value. It typically an associative array that contains a list of all the cookies values sent by the browser in the current request, keyed by cookie name.
There are two types of cookies, they are: Session Cookie: This type of cookies are temporary and are expire as soon as the session ends or the browser is closed. Persistent Cookie: To make a cookie persistent we must provide it with an expiration time.
Cookies are created to identify you when you visit a new website. The web server — which stores the website’s data — sends a short stream of identifying info to your web browser. Browser cookies are identified and read by “name-value” pairs. These tell cookies where to be sent and what data to recall.
A cookie is often used to identify a user. A cookie is a small file that the server embeds on the user’s computer. Each time the same computer requests a page with a browser, it will send the cookie too. With PHP, you can both create and retrieve cookie values.
Can we draw images using PHP?
You can draw a simple straight line between two given points using the imageline($image, $x1, $y1, $x2, $y2, $color) function. The $image parameter is an image resource that will have been created earlier using functions like imagecreatetruecolor() or imagecreatefromjpeg() .
A cookie is a small piece of text sent to your browser by a website you visit. It helps the site remember information about your visit, which can make it easier to visit the site again and make the site more useful to you.
Cookies are used to carry information from website to website, or between sessions on related websites, without having to burden a server machine with massive amounts of data storage.
There are three types of computer cookies: session, persistent, and third-party. These virtually invisible text files are all very different. Each with their own mission, these cookies are made to track, collect, and store any data that companies request.
PHP sessions rely on a cookie containing a session key. Your session data are stored only on your server, but a unique ID is assigned to each session and that ID gets saved in a cookie.
Deleting Cookie: There is no special dedicated function provided in PHP to delete a cookie. All we have to do is to update the expire-time value of the cookie by setting it to a past time using the setcookie() function. A very simple way of doing this is to deduct a few seconds from the current time.
Session cookies allow users to be recognized within a website so any page changes or item or data selection you do is remembered from page to page. … Without a cookie every time you open a new web page the server where that page is stored will treat you like a completely new visitor.