What are the considerations for working with global variables in functions and PHP 8?

When working with global variables in functions in PHP 8, it is important to consider the impact on code readability, maintainability, and potential conflicts with other variables. To avoid these issues, it is recommended to pass variables as parameters to functions rather than relying on global scope.

// Avoid using global variables in functions
$globalVar = 10;

function exampleFunction() {
    global $globalVar;
    echo $globalVar;
}

exampleFunction();

// Instead, pass variables as parameters
$globalVar = 10;

function exampleFunction($var) {
    echo $var;
}

exampleFunction($globalVar);