You learned about global and local variables earlier.
Now let's look at how to use global variables in a function.
Use the global keyword in a function.
global global variable name
Enter the global variable name to use after entering the global keyword in the function.
As always, we'll look at an example.
<?php
$disney = 'mickey';
function func(){
echo $disney;
return;
}
func();
?>
If you look at the result of the code above, you can see that nothing is executed.
Let's use the global keyword in the function func.
<?php
$disney = 'mickey';
function func(){
global $disney;
echo $disney;
return;
}
func();
?>
Result of the code above
Unlike the first example, you can use the disney variable inside a function by using the global keyword in the function.
Many global variables can use the global keyword.
global global variable name, global variable name
Then shall we look at an example?
<?php
$disney = 'mickey';
$marvel = 'iron man';
function func(){
global $disney, $marvel;
echo $disney.', '.$marvel;
return;
}
func();
?>
result
Yes, we learned about global keywords. ^^