Call function in the function - php

Question

how to about my code i cant call function inline function
Here is my code:
function antus(){
global $vidi;
$vidi = random_int(100, 999);
}
function bntus(){
global $hexa;
antus();
$hexa = 5 * $vidi;
echo $hexa;
}
bntus();
Thank you

Answer 1

You're missing return in both function and no need for global
function antus(){
$vidi = random_int(100, 999);
return $vidi;
}
function bntus(){
$v = antus();
$hexa = 5 * $v;
return $hexa;
}
$a = bntus();
echo $a;

Answer 2

While it's poor style to use global variables instead of parameters and returns, I'll show you how you would do it.
You don't need global $hexa, since you never use that variable outside the function. But you need to put global $vidi in bntus() so that it can access that variable.
Also, the name of the function to get a random integer is rand(), not random_int().
function antus(){
global $vidi;
$vidi = rand(100, 999);
}
function bntus(){
global $vidi;
antus();
$hexa = 5 * $vidi;
echo $hexa;
}
bntus();
DEMO

Answer 3

First of all your code doesn't run at all because it doesn't compile. The PHP statements end with ; (but in your code it is missing in several places).
Properly formatted and without syntax errors, the code of function bntus() should look like this:
function bntus()
{
global $hexa;
antus();
$hexa = 5 * $vidi;
echo $hexa;
}
Now it runs but it doesn't produce the result you expect because the variable $vidi is not initialized.
If you think that the call to function antus() puts some random value in $vidi then you are wrong. The function antus() puts a value in the global variable $vidi. That variable is not accessible in function bntus(); it uses an uninitialized local variable with the same name.
Read about the scope of variables in PHP.
Declaring $vidi as global in function bntus() produces the expected results but using global variables is a very poor programming technique. It is out of fashion for about 40-50 years now because it makes the programs difficult to develop and maintain.
A better approach is to let the functions return the values they compute:
function antus()
{
return random_int(100, 999);
}
function bntus()
{
return 5 * antus();
}
echo(bntus());
One more thing: you didn't post the code of function random_int() but if it does what its name says then you don't need an user function for that. PHP already provides the rand() function that, when is invoked with two integer arguments, returns a random integer number from the interval bounded by the two input values (including them).
This means the call rand(100, 999) returns a random integer number $n, 100 <= $n <= 999.