global

Okay, I'm not sure I'm understanding this concept properly (I'm learning PHP). If I understand correctly: Global variables can be referenced anywhere in the same document, or in documents linked with "include." Local variables can only be referenced in the function where they are. Okay, if I understand that correctly (which is half of the reason I'm posting, to make sure I have that right) is there really a need for local variables? I mean, if each user defined their own variables and they needed to all be saved, I can see it being useful... kind of? But, using a database for that would be

So I have two classes like this: class foo { /* code here */ } $foo = new foo(); class bar { global $foo; public function bar () { echo $foo->something(); } } I want to access the methods of foo inside all methods bar, without declaring it in each method inside bar, like this: class bar { public function bar () { global $foo; echo $foo->something(); } public function barMethod () { global $foo; echo $foo->somethingElse(); } /* etc */ } I don't want to extend it, either. I tried using the var keyword, but it didn't seem to work. What do I do in order to access the other class "foo" inside all

im now using namespaces in PHP 5.3 now there is a fallback mechanism for functions which dont exist in the namespace. so php every time checks if the function exists in namespace and then tries to load it from global space. So what about all php internal functions? strstr for example? Should i now use every php internal function with a \ ? to avoid php first checking the namespace? is this fallback a huge performance drop? what do you think? No matter the performance hit, no way should you do that. Ew, ew, ew. Any performance boost there may be is not worth your sanity. 来源： https:/

Is there a use for flagging a variable as static , when it lies in the global scope of a .cpp file, not in a function? Can you use the static keyword for functions as well? If yes, what is their use? In this case, keyword static means the function or variable can only be used by code in the same cpp file. The associated symbol will not be exported and won't be usable by other modules. This is good practice to avoid name clashing in big software when you know your global functions or variables are not needed in other modules. Nawaz Yes, if you want to declare file-scope variable, then static

I have a question and i suppose this is trivial for most around here. However, here goes -- I have an application that connects to a database to read specific information. Now this read happens across many classes in the application on a per request basis. So i wanted to restrict the number of connections to the database to 1 per request . So this is what i did. Assuming that i had a database access class, DBAccess that fetches 2 strings, a & b. I wrote a class Global that goes as follows -- public class Global { static String a; static String b; public Global(DBAccessInput input) throws

Instead of encapsulating my entire code in a try{} except{} block, is there someway of catching exceptions globally? Basically I am looking for a way to have a global exception handler which will handle all unhandled exceptions in the my python application written for google app engine If you're using the webapp framework, you should already be defining a subclass of RequestHandler that serves as a base class, with all your app's handlers extending that. You can simply override handle_exception , which serves as a global exception handler for any uncaught exceptions. The default implementation

Trying to implement the new FP 10.1 Global error handler into my projects but no matter what I do any uncaught error will still show up the Exception window (both in debug and release versions of the SWF). All I want to do is to prevent these popups but instead send a message to my logger. Here's my code ... EDIT: I simplified the code now. Could somebody do me a favor and test the following class and see if it's works for him? Because it's doesn't for me! ... package { import flash.display.Sprite; import flash.events.UncaughtErrorEvent; public class GlobalErrorHandlerTest extends Sprite {

I'm learning Swift and iOS app development and I was wondering in which cases (if there are some) I should use global variables and constants in an iOS app. Global variables are variables that are defined outside of any function, method, closure, or type context. Local variables are variables that are defined within a function, method, or closure context. Using global variables usually seems inelegant and not advisable (it is in fact not recommended by most guides and tutorials) and to pass data between view controller I use the prepareForSegue(_: sender:) method. There are some cases however