screenshot.php

<?php
if (!empty($_POST['url'])) {
    //url website
    $siteURL = $_POST['url'];

    if (filter_var($siteURL, FILTER_VALIDATE_URL)) {
        //memanggil API Google PageSpeed Insights
        $googlePagespeedData = file_get_contents("https://www.googleapis.com/pagespeedonline/v2/runPagespeed?url=$siteURL&screenshot=true");

        //data decode json
        $googlePagespeedData = json_decode($googlePagespeedData, true);

        //data screenshot
        $screenshot = $googlePagespeedData['screenshot']['data'];
        $screenshot = str_replace(array(
            '_',
            '-'
        ), array(
            '/',
            '+'
        ), $screenshot);

        //menampilkan gambar screenshot
        echo "<img src=\"data:image/jpeg;base64," . $screenshot . "\" />";
    } else {
        echo "Masukkan URL yang valid.";
    }
}
?>