<?php
$sum; // global variable
function outer() {
$hundred_more = 100;
$sum = function ($a, $b) {
return $a + $b + (++$hundred_more);
};
echo $hundred_more;
}
outer(); // define sum at the global scope and print 100
echo($sum(5, 10)); // 116
echo($sum(5, 10)); // 117
outer(); // redefine sum at the global scope and print 100
echo($sum(5, 10)); // 116
echo($sum(5, 10)); // 117
100
Warning: Undefined variable $sum in /in/m8Vf5 on line 13
Fatal error: Uncaught Error: Value of type null is not callable in /in/m8Vf5:13
Stack trace:
#0 {main}
thrown in /in/m8Vf5 on line 13
Process exited with code 255.
100
Notice: Undefined variable: sum in /in/m8Vf5 on line 13
Fatal error: Uncaught Error: Function name must be a string in /in/m8Vf5:13
Stack trace:
#0 {main}
thrown in /in/m8Vf5 on line 13
Process exited with code 255.
Output for 7.3.32 - 7.3.33
100
Fatal error: Uncaught Error: Function name must be a string in /in/m8Vf5:13
Stack trace:
#0 {main}
thrown in /in/m8Vf5 on line 13
Process exited with code 255.
100
Notice: Undefined variable: sum in /in/m8Vf5 on line 13
Fatal error: Function name must be a string in /in/m8Vf5 on line 13
Process exited with code 255.