How can the EVA principle and context switching be applied effectively in PHP code to improve functionality and readability?

Issue: The EVA principle (Explicit is better than implicit) emphasizes clarity and readability in code, while context switching can help improve performance by reducing unnecessary processing. To apply these principles effectively in PHP code, make sure to explicitly define variables and functions, and minimize context switching by keeping related code together. PHP Code Snippet:

// Explicitly define variables and functions
$first_name = "John";
$last_name = "Doe";

function get_full_name($first_name, $last_name) {
    return $first_name . " " . $last_name;
}

// Keep related code together to minimize context switching
echo "Hello, " . get_full_name($first_name, $last_name);