case_study_07.php

<?php

$input_one = ['Ricky Andika Putra', 'Ramadani', 'Asep Dadang Supriadi', 'Akmal Fuady', 'Yandi Fitriyanto'];
$input_two = ['Ricky Andika Putra', 'Yandi Fitriyanto', 'Muhammad Sholeh', 'Yadi Cahyadi'];

$result = array_count_values(array_merge($input_one, $input_two));

foreach ($result as $key => $value)
{
	if($value == 2)
	{
		$hasil[] = $key;
	}
}

print_r($hasil);