$url = 'http://example.com';

$caller = new \PhpInsights\InsightsCaller('your-google-api-key-here', 'de');
$response = $caller->getResponse($url, \PhpInsights\InsightsCaller::STRATEGY_MOBILE);
$result = $response->getMappedResult();

var_dump($result->getSpeedScore()); // 100 
var_dump($result->getUsabilityScore()); // 100 

$urls = array(
    'http://example.com', 
    'http://example2.com', 
    'http://example3.com'
);

$caller = new \PhpInsights\InsightsCaller('your-google-api-key-here', 'fr');
$responses = $caller->getResponses($urls, \PhpInsights\InsightsCaller::STRATEGY_MOBILE);

foreach ($responses as $url => $response) {
    $result = $response->getMappedResult();

    var_dump($result->getSpeedScore()); // 100 
    var_dump($result->getUsabilityScore()); // 100 
}

/** @var \PhpInsights\Result\InsightsResult $result */
foreach($result->getFormattedResults()->getRuleResults() as $rule => $ruleResult) {
    
    /*
     * If the rule impact is zero, it means that the website has passed the test.
     */
    if($ruleResult->getRuleImpact() > 0) {
    
        var_dump($rule); // AvoidLandingPageRedirects
        var_dump($ruleResult->getLocalizedRuleName()); // "Zielseiten-Weiterleitungen vermeiden"
        
        /*
         * The getDetails() method is a wrapper to get the `summary` field as well as `Urlblocks` data. You
         * can use $ruleResult->getUrlBlocks() and $ruleResult->getSummary() instead. 
         */
        foreach($ruleResult->getDetails() as $block) {
            var_dump($block->toString()); // "Auf Ihrer Seite sind keine Weiterleitungen vorhanden"
        }
    
    }
    
}

/** @var \PhpInsights\Result\InsightsResult $result */
foreach($result->getFormattedResults()->getRuleResultsByGroup(RuleGroup::GROUP_SPEED) as $rule => $ruleResult) {
    $ruleResult->getSummary()->toString();
}

print $result->screenshot->getImageHtml(); // html image element
print $result->screenshot->getData(); // base64 screenshot representation