Use: global.php <?php if(!session_id()) session_start(); $filename = “test”; if(!isset($_SESSION[‘filename’])) { $_SESSION[‘filename’] = $filename; } ?> test.php <?php if(!session_id()) session_start(); //include(“global.php”); $_SESSION[‘filename’] = “new value”; ?> test1.php <?php if(!session_id()) session_start(); $filename = $_SESSION[‘filename’]; echo $filename; //output new value ?>
The global declaration is when you declare that times is global def timeit(): global times # <- global declaration # … If a variable is declared global, it can’t be used before the declaration. In this case, I don’t think you need the declaration at all, because you’re not assigning to times, just modifying it.
In the first case the global keyword is pointless, so that is not correct. Defining a variable on the module level makes it a global variable, you don’t need the global keyword. The second example is correct usage. However, the most common usage for global variables are without using the global keyword anywhere. The global … Read more
If you have already tried restarting your server as Ryan suggested, try putting it in your application.rb like this: module MyAppName class Application < Rails::Application YOUR_GLOBAL_VAR = “test” end end Then you can call it with the namespace in your controllers, views or wherever.. MyAppName::Application::YOUR_GLOBAL_VAR Another alternative would be using something like settingslogic. With settingslogic, … Read more
Option 1 You could store the custom class object to the app instance, which allows you to store arbitrary extra state using the generic the app.state attribute, as demonstrated here, as well as here and here. To access the app.state attribute, and subsequently the object, outside the main file (for instance, from a routers submodule … Read more
Outside of any function, int x; is a tentative definition, and some compilers and linkers treat them as a sort of “cooperative definition,” where an identifier can be declared this way in multiple files and will result in defining only one object. C’s rules for external declarations (declarations outside of functions) are a bit complicated … Read more
The problem with global variables is that since every function has access to these, it becomes increasingly hard to figure out which functions actually read and write these variables. To understand how the application works, you pretty much have to take into account every function which modifies the global state. That can be done, but … Read more
From the documentation on parfor: The body of a parfor-loop cannot contain global or persistent variable declarations. In the context of your problem, i.e., calling a function within the parfor that in turn references a global, this translates into: “parfor will probably not give expected or meaningful results”. This makes perfect sense. Consider the following … Read more
What is the reason behind this? C(unlike C++) does not allow initialization of global values with non constant values. C99 Standard: Section 6.7.8: All the expressions in an initializer for an object that has static storage duration shall be constant expressions or string literals.
I understand that I can use global statement to access global variables Your understanding is wrong. You can always access a global variable as long as you don’t have a local variable of the same name. You only need the global statement when you are going to change what object a variable name refers to. … Read more