Why i get error

Question

$num1 is a global variable, isn't it ?
https://code.sololearn.com/wGC5SPcyq1Vp/?ref=app

Answer 1

have to change the global declaration

Answer 2

<?php
$num1 =56;
function my_func() {
$_GLOBALS['num1'] = 86;
}
my_func();
echo $num1;
?>

Answer 3

The first line must be <?php not just php

Answer 4

Here
<?php
$num1 =56;
function my_func() {
$num1=89;
echo $num1;
}
my_func();
?>

Answer 5

thanks #ariela #jothin rain