How can code design impact the accessibility and scope of variables in PHP functions?

Code design can impact the accessibility and scope of variables in PHP functions by determining whether variables are local, global, or static. To ensure proper variable scope and accessibility, it is important to declare variables within the appropriate scope and avoid using global variables excessively. By following good coding practices and properly scoping variables, you can prevent conflicts and ensure that variables are accessible where they are needed.

function exampleFunction() {
    $localVariable = "I am a local variable";
    
    echo $localVariable;
}

exampleFunction();