$GLOBALS
$GLOBALS is a PHP super global variable which is used to access global variables from anywhere in the PHP script (also from within functions or methods).
PHP stores all global variables in an array called $GLOBALS[index].
The index holds the name of the variable.
The example below shows how to use the super global variable $GLOBALS:
<?php
$x = 75;
$y = 25;
function addition() {
$GLOBALS['z'] = $GLOBALS['x'] + $GLOBALS['y'];
}
addition();
echo $z;
?>
$_COOKIE
A cookie is often used to identify a user.
PHP Cookie must be used before <html> tag.
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.
Create Cookies With PHP
A cookie is created with the setcookie() function.
Syntax
setcookie(name, value, expire, path, domain, secure, httponly);
Only the name parameter is required.
All other parameters are optional
<?php
$time=time();
echo $time;
setcookie('student','Bhanu',$time+60);
?>
<?php
$student=$_COOKIE['student'];
echo $student;
?>
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