Differences between global and $ GLOBALS [] in php

In php, global and $ GLOBALS [] are common global variables. let's take a look at a simple example to differentiate the usage of global and $ GLOBALS. According to the official explanation:

In php, global and $ GLOBALS [] are common global variables. let's take a look at a simple example to differentiate the usage of global and $ GLOBALS.

According to the official explanation:

1. $ GLOBALS ['var'] is an external global variable.

The instance code is as follows:

2. $ Var1 = 1;
3. Function test (){
4. Unset ($ GLOBALS ['var1']);
5. }
6. Test ();
7. Echo $ var1;
8. ?>

2. global $ var is an external reference or pointer of $ var with the same name.

The instance code is as follows:

1. $ GlobalStr = '. com ';
2.  
3. Function globalTest (){
4.  
5. Global $ globalStr;
6.  
7. $ GlobalStr = 'coderbolg '. $ globalStr;
8.  
9. Unset ($ globalStr );
10.  
11. }
12.  
13. GlobalTest ();
14.  
15. Echo $ globalStr; // input: coderbolg.com