Why is it important to separate concerns and adhere to the EVA principle when developing PHP applications that interact with databases?

It is important to separate concerns and adhere to the EVA principle when developing PHP applications that interact with databases to improve code maintainability, scalability, and reusability. By separating concerns, you can easily make changes to one part of the application without affecting other parts. Adhering to the EVA principle (Entity-View-Action) helps in structuring your code in a more organized manner, making it easier to understand and maintain. 

// Example of separating concerns and adhering to the EVA principle
class User {
    private $db;

    public function __construct($db) {
        $this->db = $db;
    }

    public function getById($id) {
        // Entity: User
        $query = "SELECT * FROM users WHERE id = :id";
        $stmt = $this->db->prepare($query);
        $stmt->bindParam(':id', $id);
        $stmt->execute();
        return $stmt->fetch();
    }

    // View and Action methods can be implemented similarly
}

Keywords

separate concerns EVA principle PHP applications databases interaction

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