<?php

 class Test
 {
    
    public $valor = 'testeClasse';
    
 }
   //instância do objeto
    $objeto = new Test();
    
    //array
    $array['valor'] = 'testeArray';
    
    //cast array
    $saidaArray = (array) $objeto;
    //cast object
    $saidaObject = (object) $array;
    
    //saídas
    print_r($saidaArray);
    print_r($saidaObject);