javascript python java c# php android html jquery c++ css ios mysql sql r node.js arrays reactjs c asp.net json ruby-on-rails .net sql-server swift python-3.x objective-c django angular angularjs excel regex pandas ruby iphone ajax linux xml vba asp.net-mvc spring laravel database wordpress typescript string wpf mongodb windows xcode postgresql bash oracle git vb.net amazon-web-services multithreading list firebase flutter eclipse spring-boot dataframe azure react-native algorithm docker macos forms image visual-studio scala powershell function twitter-bootstrap numpy api performance selenium winforms python-2.7 matlab vue.js sqlite apache hibernate entity-framework loops rest shell facebook express android-studio csv linq maven qt swing unit-testing file tensorflow

[ACCEPTED]-Global Variables in a WordPress Plugin-wordpress-admin

Accepted answer
Score: 10

It turns out if you want a global variable 4 for your install function, you must declare 3 it to be global.

global $version = '1.0a';
register_activation_hook( __FILE__, 'install' );
function install() {
  global $version;
  add_option( 'test_version', $version );
}

More information can be 2 found at the link below under the "A 1 Note on Variable Scoping" section: http://codex.wordpress.org/Function_Reference/register_activation_hook

Source: stackoverflow.com

More Related questions

The best way to use variables on all WordPress pages

Are variables outside functions global variables?

Global vs static variables in PHP

Global variable in laravel controller

Use a variable from __construct() in other methods

In XSLT how do I increment a global variable from a different scope?

C - program structure (avoiding global variables, includes, etc.)

In C, does using static variables in a function make it faster?

Finding the address range of the data segment

Does Xcode have a watch window?