$testUrl = "https://financialmodelingprep.com/api/v3/economic_calendar"
    . "?from=" . date('Y-m-d')
    . "&to=" . date('Y-m-d', strtotime('+7 days'))
    . "&apikey=Zjj1i4ueHkSX6r1xkRrkJvkOD6Gp7Kiw";

$ch = curl_init();
curl_setopt_array($ch, [
    CURLOPT_URL => $testUrl,
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_TIMEOUT => 20,
    CURLOPT_SSL_VERIFYPEER => false,
    CURLOPT_SSL_VERIFYHOST => false,
]);
$raw = curl_exec($ch);
$error = curl_error($ch);
curl_close($ch);

echo "<h2>RAW FMP RESPONSE</h2>";
echo "<pre>";

if ($raw === false) {
    echo "CURL ERROR:\n";
    echo $error;
} else {
    echo htmlspecialchars($raw);
}

echo "</pre>";
exit;