PHP Extension GMail: Get a specific message (format="minimal")

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Gets a specific message using format=minimal.

Documentation: https://developers.google.com/gmail/api/v1/reference/users/messages/get

<?php

// The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number.
// For example, if using Chilkat v9.5.0.48, then include as shown here:
include("chilkat_9_5_0.php");

$rest = new CkRest();

//   Provide a previously obtained OAuth2 access token.
$oauth2 = new CkOAuth2();
$oauth2->put_AccessToken('OAUTH2_ACCESS_TOKEN');
$rest->SetAuthOAuth2($oauth2);

$success = $rest->Connect('www.googleapis.com',443,true,true);
if ($success != true) {
    print $rest->lastErrorText() . "\n";
    exit;
}

$rest->AddPathParam('messageId','15fc237e79da4174');

$rest->AddQueryParam('format','minimal');

$sbJson = new CkStringBuilder();
$success = $rest->FullRequestNoBodySb('GET','/gmail/v1/users/me/messages/messageId',$sbJson);
if ($success != true) {
    print $rest->lastErrorText() . "\n";
    exit;
}

if ($rest->get_ResponseStatusCode() != 200) {
    print 'Received error response code: ' . $rest->get_ResponseStatusCode() . "\n";
    print 'Response body:' . "\n";
    print $sbJson->getAsString() . "\n";
    exit;
}

$json = new CkJsonObject();
$json->LoadSb($sbJson);

//  The following code parses the JSON response.
//  A sample JSON response is shown below the sample code.

$id = $json->stringOf('id');
$threadId = $json->stringOf('threadId');
$snippet = $json->stringOf('snippet');
$historyId = $json->stringOf('historyId');
$internalDate = $json->stringOf('internalDate');
$sizeEstimate = $json->IntOf('sizeEstimate');
$i = 0;
$count_i = $json->SizeOfArray('labelIds');
while ($i < $count_i) {
    $json->put_I($i);
    $strVal = $json->stringOf('labelIds[i]');
    $i = $i + 1;
}

print 'Example Completed.' . "\n";

?>

Sample JSON Response Body

{
  "id": "15fc237e79da4174",
  "threadId": "15fc237e79da4174",
  "labelIds": [
    "IMPORTANT",
    "SENT",
    "INBOX"
  ],
  "snippet": "This is a test email with 2 attachments.",
  "historyId": "1582",
  "internalDate": "1510791964000",
  "sizeEstimate": 11153
}