What are the advantages of using classes in PHP compared to functions for tasks like form validation?

Using classes in PHP for tasks like form validation offers several advantages over using functions. Classes allow for better organization and encapsulation of related functionality, making the code more modular and easier to maintain. Additionally, classes can store state information between function calls, which can be useful for tasks like form validation where multiple validation steps may be needed. Lastly, classes support inheritance and polymorphism, allowing for more flexibility and reusability in the code. 

class FormValidator {
    private $errors = [];

    public function validateForm($formData) {
        // Validation logic here
    }

    public function getErrors() {
        return $this->errors;
    }
}

// Example of using the FormValidator class
$validator = new FormValidator();
$validator->validateForm($_POST);

if (!empty($validator->getErrors())) {
    // Display errors to the user
}

Keywords

classes functions form validation object-oriented programming PHP

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