header('Content-type: text/html; charset=utf-8');

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "https://www.aksam.com.tr/guncel/dsoden-sevindiren-haber-geldi-3-asida-insan-testlerine-baslandi/haber-1063246");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$output = curl_exec($ch);
curl_close($ch);
preg_match("&charset=(.*?)\" />&", $output, $result);
print_r($result);