PHP Session & PHP Cookies
PHP Session
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.
Sample Code & Output
<?php
session_start();
?>
<!DOCTYPE html>
<html>
<body>
<?php
session_start();
?>
<!DOCTYPE html>
<html>
<body>
<?php
// Set session variables$_SESSION["favcolor"] = "green";
$_SESSION["favanimal"] = "cat";
echo "Session variables are set.";
$_SESSION["favanimal"] = "cat";
echo "Session variables are set.";
// Echo session variables that were set on previous pageecho "Favorite color is " . $_SESSION["favcolor"] . ".<br>";
echo "Favorite animal is " . $_SESSION["favanimal"] . ".";
?>
</body>
</html>
Output:
Session variables are set.
Favorite color is green.
Favorite animal is cat.
Favorite color is green.
Favorite animal is cat.
PHP Cookies
What is a Cookie?
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.
Syntax
setcookie(name, value, expire, path, domain, secure, httponly);
Sample Code & Output
<?php
$cookie_name = "user";
$cookie_value = "John Doe";
setcookie($cookie_name, $cookie_value, time() + (86400 * 30), "/"); // 86400 = 1 day
if(!isset($_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];
}
echo "<strong>Note:</strong> You might have to reload the page to see the value of the cookie";
?>
Ref :
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