Advanced PHP This segment will concentrate on some progressed PHP points, which will engage the per user to make dynamic web pages. Superglobals A global variable is a variable declared at the top of the script outside the function. This variable is available to the complete script. Superglobal variables are arrays built into PHP. These superglobal variables are populated automatically with useful elements, and they are available in any scope. A superglobal array can be accessed within a function or a method without using the global keyword. PHP Superglobals $_COOKIE – It contains values provided to the script via HTTP cookies. $_GET – It contains variables submitted to the script using HTTP get method. $_POST – It contains variables submitted to the script using HTTP post method. $_REQUEST – It is a combined array containing values from the $_GET, $_POST, and $_COOKIES superglobal arrays. $...