如何以编程方式更新与Google Analytics中的客户端ID相关联的自定义字段？

I want to programmatically update a custom field associated with a Google Analytics Client ID. The custom field I want to associate with each Client Id, will be called "Leads" and it's value can either be "Sold" or it can be empty.

I want to know how to update custom data by Client ID; either via PHP or JavaScript. Is this possible with analytics.js or possibly a REST api of some sort?

Thank you.

You can programmatically push data to Google Analytics via Google's Measurement Protocol.

In order to associate custom data to a client id you must create a custom dimension.

Example code (PHP) pushing data to Google Analytics.

// init curl handler
$ch = curl_init();

// replace these values with your tracking id and the client id
$trackingId = '';
$clientId   = '';

// set url
$baseUrl = 'https://www.google-analytics.com/debug/collect?v=1&tid='.$trackingId;
$url     = $baseUrl.'&t=pageview&dp=%2F&cd1=Sold&cid='.$clientId;

// set options
curl_setopt_array($ch, array(
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_URL => $url
));

$response = curl_exec($ch);

print_r($response);

I am still unsure of how to globally update that custom dimension for the client id, so I created an alternate question for that here.