cors header ‘access-control-allow-origin’ missing IN PARTICULAR CAKEPHP API

PHP
header('Access-Control-Allow-Origin: *');
header('Access-Control-Allow-Methods: POST, GET, PUT, PATCH, DELETE, OPTIONS');
header('Access-Control-Allow-Headers: *');
if ($_SERVER['REQUEST_METHOD'] == 'OPTIONS') {
    exit(0);
}

Source

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