<?php

$array = [];

class Test
{
	private $testValue = "test";
	
	public function getTestValue()
	{
		return $this->testValue;
	}
}

for($i = 0; $i < 5; $i++) {
	$array[] = new Test; // или clone Test
}

foreach($array as $value) {
	echo $value->getTestValue() . PHP_EOL;
}