I have the following problem - lets say I have a class named Database
class Database
{
public function insert(...)
{
//insert something in the database
}
}
And I have a class named User
class User
{
public function register(..)
{
//validate the user , and insert him
//here i need to call insert() function from Database class
}
}
Is there a simple way in which I can call the insert method inside the User class?
using dependency injection you would typically do it something like this
class Database
{
public function insert(...)
{
//insert something in the database
}
}
class User
{
private $db;
public function __construct($db){
$this->db=$db
}
public function register(..)
{
//validate the user , and insert him
//here i need to call insert() function from Database class
$this->db->insert();
}
}
$db=new Database();
$usr=new User( $db );
$usr->register();
Just make an object in the user class and call the method in it like
class User
{
public function register(..)
{
//validate the user , and insert him
//here i need to call insert() function from Database class
$useit= new Database; //assign an object of type database
$useit->insert(); //call the method like this
}
}
Create an instance of the class you want to import in the constructor of the class you're importing it to.
class User {
private $database;
public function __construct() {
$this->database = new Database;
}
public function register() {
$this->database->insert();
}
}
class Database {
public function insert() {
}
}
$user = new User;
$user->register();
This answer should help. You can access all methods and properties of the Database class by referencing $this->database.
dependency injection- perhaps might be of interest php-di.org/doc/understanding-di.html and / or stackoverflow.com/questions/130794/what-is-dependency-injectionDatabaseclass need to be instanciated? Why not make it static?static public function insert(), then inregister(), useDatabase::insert(...).