How can the design of PHP classes affect the clarity and functionality of the code, as seen in the provided example?

The design of PHP classes can greatly impact the clarity and functionality of the code. By following best practices such as using meaningful class names, organizing properties and methods logically, and adhering to the single responsibility principle, the code becomes easier to understand and maintain. Additionally, utilizing proper encapsulation and abstraction can improve code readability and reduce potential bugs. 

class User {
    private $firstName;
    private $lastName;
    
    public function __construct($firstName, $lastName) {
        $this->firstName = $firstName;
        $this->lastName = $lastName;
    }
    
    public function getFullName() {
        return $this->firstName . ' ' . $this->lastName;
    }
}

Keywords

PHP classes code design functionality clarity example

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