<?php
$token = $argv[1] ?? null;
if ($token == '') {
    echo "Token empty\n";
    exit(1);
}

$parts = explode('.', $token);
echo 'Token has ' . count($parts) . " parts\n";

echo "\n";
echo "Part #0:\n";
$json = base64_decode($parts[0]);
$data = json_decode($json);
if ($data === null) {
    echo $json . "\n";
} else {
    echo json_encode($data, JSON_PRETTY_PRINT) . "\n";
}

echo "\n";
echo "Part #1:\n";
$json = base64_decode($parts[1]);
$data = json_decode($json);
if ($data === null) {
    echo $json . "\n";
} else {
    echo json_encode($data, JSON_PRETTY_PRINT) . "\n";
    if (isset($data->iat) && $data->iat !== null) {
        echo 'Issued at:  ' . date('c', $data->iat) . "\n";
    }
    if (isset($data->nbf) && $data->nbf !== null) {
        echo 'Not before: ' . date('c', $data->nbf) . "\n";
    }
    if (isset($data->exp) && $data->exp !== null) {
        echo 'Expires:    ' . date('c', $data->exp) . "\n";
    }
}

?>