PHP SDK

Server-side PHP SDK mirroring the Mixpanel PHP library - if you have used `mixpanel-php` you already know this SDK. Requires PHP 8.1+ with `ext-curl` and `ext-json`, no other dependencies.

Install

bash
composer require cohorly/cohorly-php

Initialize

php
<?php
require 'vendor/autoload.php';
use Cohorly\Cohorly;
$cohorly = Cohorly::getInstance('YOUR_PROJECT_TOKEN', [
    'host' => 'https://cohorly-service.velloalabs.com', // your Cohorly server
]);
// Track an event
$cohorly->track('button clicked', [
    'distinct_id' => 'user-123',
    'label' => 'sign-up',
]);
// Or identify once and let every subsequent event carry the id
$cohorly->identify('user-123');
$cohorly->track('page viewed', ['page' => '/pricing']);
// Profile updates
$cohorly->people->set('user-123', ['$name' => 'Ada', 'plan' => 'pro']);

Events are queued in memory and sent in batches: when the queue reaches max_batch_size, when you call flush(), or automatically in the destructor at the end of the request - like mixpanel-php.

API

Member	Notes
`Cohorly::getInstance($token, $options)`	Singleton per token. Options: `host`, `max_batch_size` (50, server cap 500), `consumer`, `debug`, `timeout`.
`track($event, $props)`	Stamps `time` (unix ms), `$insert_id`, `$lib`, `$lib_version`; call-site props win.
`identify($id)` / `register($k, $v)` / `reset()`	Request-lifetime identity and super properties, like mixpanel-php.
`alias($alias, $distinctId)`	POST /alias (flushes queued events first to preserve ordering).
`people->set / setOnce / increment / remove / deleteUser`	Profile updates mapped to /engage ops.
`flush()`	Deliver all queued messages now.

Delivery and retries

Implements the shared Cohorly retry contract: 429/5xx/network errors keep the queue with exponential backoff honoring Retry-After; 413 halves the batch size; 400 drops the batch; 401 keeps the queue at max backoff; the queue caps at 1000 messages. PHP processes are request-scoped, so anything still queued is retried on flush() or in the destructor. Custom consumer strategies are pluggable exactly like mixpanel-php.