PHP program to demonstrate the use of the local and global variables

Program/Source Code:

The source code to demonstrate the local and global variables is given below. The given program is compiled and executed successfully.

<?php
    //PHP program to access the global variable 
    //from the function.
    $NUM=10;
    function test_fun()
    {
        $NUM=20;   
        printf("<br>Local NUM : %d",$NUM);
        
        global $NUM;
        printf("<br>Global NUM : %d",$NUM);
    }
    test_fun();
?> 

Output:

Local NUM : 20
Global NUM : 10

Explanation:

In the above program, we created a global variable $NUM initialized with value 10. After that we created the local variable $NUM initialized with 20 inside the function test_fun(). And then printed the value of the local variable inside the function test_fun(). After that, we used the global keyword to access the value of the global variable $NUM, and then we printed the value of the global variable on the webpage.