What are the best practices for handling function parameters, especially when dealing with multiple functions in PHP?

When dealing with multiple functions in PHP, it is important to handle function parameters consistently to ensure code readability and maintainability. One best practice is to clearly define the parameters expected by each function and ensure they are properly validated before use. Additionally, consider using default parameter values or type declarations to enforce data integrity and make the code more robust. 

<?php
function addNumbers(int $num1, int $num2): int {
    return $num1 + $num2;
}

function greetUser(string $name = 'Guest'): string {
    return 'Hello, ' . $name . '!';
}

// Example usage
echo addNumbers(5, 3); // Output: 8
echo greetUser(); // Output: Hello, Guest!
echo greetUser('John'); // Output: Hello, John!
?>

Keywords

function parameters PHP functions handling multiple functions

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