What are some best practices for handling data type validation in PHP, especially when dealing with method arguments?

When handling data type validation in PHP, especially with method arguments, it's important to ensure that the data being passed into the method is of the expected type. This helps prevent unexpected errors or bugs in your code. One way to achieve this is by using type hinting in PHP, which allows you to specify the expected data type for method arguments. 

```php
function calculateSum(int $num1, int $num2) {
    return $num1 + $num2;
}

// Example usage
$result = calculateSum(5, 10); // Output: 15
```

In this example, we use type hinting to specify that the `num1` and `num2` arguments should be integers. If a non-integer value is passed into the `calculateSum` function, PHP will throw a type error. This helps ensure that the data being processed is of the correct type.

Keywords

data type validation PHP method arguments error handling type hinting

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