What are some best practices for passing parameters to functions in PHP?

When passing parameters to functions in PHP, it is best practice to clearly define the data type expected for each parameter to ensure type safety and prevent unexpected behavior. Additionally, it is recommended to provide default values for optional parameters to make the function more flexible. Using meaningful parameter names and documenting the purpose of each parameter can also improve code readability and maintainability. 

// Example of passing parameters to a function in PHP
function calculateTotal(int $quantity, float $price, string $currency = 'USD') {
    // Function logic here
}

// Calling the function with required and optional parameters
calculateTotal(5, 10.99); // Default currency is USD
calculateTotal(3, 25.50, 'EUR'); // Specifying a different currency

Keywords

PHP function parameters pass by reference pass by value type hinting

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