PHP scoping is what happens when each scope, including parent and child scopes are completely isolated (except 'superglobals', of which globals are within). To

PHP scoping is what happens when each scope, including parent and child scopes are completely isolated (except 'superglobals', of which globals are within). To create a closure, you must use "use" and specify the variables to close over. To use globals, you have to say "I want this to be from the global scope or make a global otherwise". Leads to a lot of verbose code and cripples ability to really use FP ideas.