How can the EVA-Principle be applied to address the issue of accessing a variable before it is defined in PHP?

Issue: Accessing a variable before it is defined in PHP can lead to errors or unexpected behavior in your code. To address this issue, you can use the EVA-Principle (Error Visibility and Assignment) by ensuring that all variables are defined before they are accessed or used in your code.

// Define the variable before accessing it
$variable = "Hello World";

// Access the variable after it has been defined
echo $variable;