This method is typically used in property alteration pipelines to ensure that the given value is strictly an integer type. If the value is already an integer, it is returned unchanged and the $modified flag remains false.

• If the value is an array, each element is individually cast to integer.
• If the value is not an integer, it is cast using intval().

The $modified flag will be set to true whenever at least one value is cast to integer (i.e., when its original type was not already int).

Example:

use oihana\traits\alters\AlterIntPropertyTrait;

class Product {
    use AlterIntPropertyTrait;
}

$product = new Product();
$modified = false;

// Casting a single value
$id = $product->alterIntProperty("42", $modified);
// $id === 42  (int)
// $modified === true

// Casting an array of values
$values = $product->alterIntProperty(["10", "20", "30"], $modified);
// $values === [10, 20, 30] (all int)
// $modified === true

// Already an int
$count = $product->alterIntProperty(5, $modified);
// $count === 5 (int)
// $modified === false