Install component with composer.
composer require --dev n98/junit-xmlrequire_once __DIR__ . '/../vendor/autoload.php';
$document = new \N98\JUnitXml\Document();
$suite = $this->document->addTestSuite();
$timeStamp = new \DateTime();
$suite->setName('My Test Suite');
$suite->setTimestamp($timeStamp);
$suite->setTime(0.344244);
$testCase = $suite->addTestCase();
$testCase->addError('My error 1', 'Exception');
$testCase->addError('My error 2', 'Exception');
$testCase->addError('My error 3', 'Exception');
$testCase->addError('My error 4', 'Exception');
$testCase->addFailure('My failure 1', 'Exception');
$testCase->addFailure('My failure 2', 'Exception');
$document->save('results.xml');