PHP call methods of others classes - php

Question

In my php project I've create 4 classes
CONNECTION
class Mysqliconn {
public $mysqli;
public function __construct(){
include "dbconfig.php";
$this->connect($host, $user, $password, $database, $charset);
}
public function connect (.....)
$this->mysqli = new mysqli(......);
}
}
UPLOAD
class Upload {
private $db;
public function __construct( Mysqliconn $db ) {
$this->db = $db;
}
public function getID($id) {
echo $id;
}
}
USERS
class Users {
private $db;
public function __construct( Mysqliconn $db ) {
$this->db = $db;
}
public function getName($name) {
echo $name;
}
}
CARS
class Cars {
private $db;
public function __construct( Mysqliconn $db ) {
$this->db = $db;
}
public function getCars($cars) {
echo $cars;
}
}
In my php page I instantiate the classes in this way
function __autoload($class_name) {
if(file_exists('class/class.' . strtolower($class_name) . '.php')) {
require_once('class/class.' . strtolower($class_name) . '.php');
}
else {
throw new Exception("Unable to load $class_name.");
}
}
$db = new Mysqliconn();
$up = new Upload($db);
$us = new Users($db);
$cs = new Cars($db);
$cs->getCars('BMW');
$us->getName('Foo');
In my Cars Class I'd like to call method of classes Users and Upload.
Is it possibile to do? How could I do this? Thanks.

Answer 1

class Example{
public function __construct(){
$otherClass = new OtherClass();
$otherClass->functionInOtherClass();
}
}
or
class Example{
public function __construct($objFromOtherClass){
$objFromOtherClass->functionInOtherClass();
}
}
or
class Example{
public function __construct(OtherClass $objFromOtherClass){
$objFromOtherClass->functionInOtherClass();
}
}
If the object in question will be used throughout your Example class:
class Example{
protected $objFromOtherClass;
public function __construct(OtherClass $objFromOtherClass){
$this->objFromOtherClass = $objFromOtherClass;
}
public function test(){
$this->objFromOtherClass->functionInOtherClass();
}
}

Answer 2

You can call a public static function inside an other class:
class Users {
private $db;
public function __construct( Mysqliconn $db ) {
$this->db = $db;
}
public static function getName($name) {
echo $name;
}
}
class Cars {
private $db;
public function __construct( Mysqliconn $db ) {
$this->db = $db;
}
public function getCars($cars) {
echo $cars;
}
public function callGetName($name)
{
return Users:: getName($name) ;
}
}
Another option would be:
function callGetName($name)
{
$user = new Users();
$user->getName($name);
}