(PHP Extension) Find a Label ID by Name

Lookup the ID of a GMail label by the label name.

Chilkat PHP Downloads PHP Extension for Windows, Linux, MacOS, Alpine Linux, Solaris

<?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");

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

$http = new CkHttp();
$http->put_AuthToken('GMAIL-ACCESS-TOKEN');

$userId = 'me';
$http->SetUrlVar('userId',$userId);

$url = 'https://www.googleapis.com/gmail/v1/users/{$userId}/labels';

// Get the list of GMail labels as JSON.
$sb = new CkStringBuilder();
$success = $http->QuickGetSb($url,$sb);
if ($success != true) {
    print $http->lastErrorText() . "\n";
    exit;
}

$json = new CkJsonObject();
$json->LoadSb($sb);
$json->put_EmitCompact(false);
print $json->emit() . "\n";

if ($http->get_LastStatus() != 200) {
    print 'Failed.' . "\n";
    exit;
}

// The JSON returned looks like this:
// {
//   "labels": [
//     {
//       "id": "Label_5",
//       "name": "QA",
//       "messageListVisibility": "show",
//       "labelListVisibility": "labelShow",
//       "type": "user"
//     },
//     {
//       "id": "Label_21",
//       "name": "[Gmail]/testFolder",
//       "type": "user"
//     },
//     {
//       "id": "CATEGORY_PERSONAL",
//       "name": "CATEGORY_PERSONAL",
//       "type": "system"
//     },
// 	...

// The name of the label is generally known because it's what we visually see.
// The id is what we need to get.  Assuming the name is unique,
// find the JSON record having name=<desired name>
// For example...
// jRecord is a CkJsonObject
$jRecord = $json->FindRecord('labels','name','QA',false);
if ($json->get_LastMethodSuccess() == true) {
    print 'The id of QA is: ' . $jRecord->stringOf('id') . "\n";

}

// jRecord is a CkJsonObject
$jRecord = $json->FindRecord('labels','name','[Gmail]/testFolder',false);
if ($json->get_LastMethodSuccess() == true) {
    print 'The id of [Gmail]/testFolder is: ' . $jRecord->stringOf('id') . "\n";

}

// jRecord is a CkJsonObject
$jRecord = $json->FindRecord('labels','name','questions',false);
if ($json->get_LastMethodSuccess() == true) {
    print 'The id of questions is: ' . $jRecord->stringOf('id') . "\n";

}

// Output:

// The id of QA is: Label_5
// The id of [Gmail]/testFolder is: Label_21
// The id of questions is: Label_43

?>