Description:
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Currently there is no way to access global variables inside a function/class scope without using the global keyword or $GLOBAL variable

As a result it is not possible to create for example a Config class that can easily be accessed throughout an entire project

To have usable code one is forced to use static classes, retrofit some sort of static constructor/init function and reference the config variables with for example Config::$defaultUser

If it where possible to register custom superglobal one could use an instance of these kind of classes instead of a static class.

For php7 it is said that an Array Constant can be created which will create a partial solution.

Having the possibility to register a variable as a superglobal would greatly reduce the need for static classes and/or other trickery.
An alternative would be to have the possibility of adding custom superglobals in php.ini but this would be less practical



Test script:
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// Suggested ways to use it on the php coding side

$config = Config::getInstance(); //singleTon

register_superglobal($config);

function X(){
  $config->saveSettings();
}