PHP global Variable 2

PHP can store all the global variables in an array of $globals[index], subscript the name of the variable, the array can be accessed within the subscript, or directly change the value of the global variable, the previous example of a global variable can be changed to write the following

"utf-8  " />php$x=5; $y=ten; function test () {  $GLOBALS ['y  '] = $GLOBALS ['x'] + $GLOBALS ['y' ];} Test (); Echo  $y;? ></body>
The output is 15.
PHP global Variable 2