How to declare that a variable is an object?

Question

PHP

To indicate that a variable is an array - they write $var = array();
, but how to indicate that this is an object?

Answer 1

php.net/manual/en/language.types.object.php

<?php
$obj = (object) 'ciao';
echo $obj->scalar;  // выведет 'ciao'
?>

<?php
$object = new stdClass();
?>

Answer 2

<?php
$object = new ClassName();
?>