test.php

<?php
class Result {
	/** @var int */
	private $num;

	/**
	 * @param int $num
	 */
	public function __construct($num) {
		$this->num = $num;
	}

	/**
	 * @return int
	 */
	public function getNum() {
		return $this->num;
	}
}

/**
 * @param int $times
 * @return Result[]
 */
function test($times) {
	$res = [];
	for($i=0; $times--; $i++) {
		$res[] = new Result($i);
	}
	return $res;
}

$items = test(10);

foreach($items as $item) {
	$item-> /* autocomplete: getNum(): int */
}