README

May 13, 2026 - 2.11.0

This library provides an API to track events and update profiles on Mixpanel.

Install with Composer

Add mixpanel/mixpanel-php as a dependency and run composer update

"require": {
    ...
    "mixpanel/mixpanel-php" : "2.*"
    ...
}

Now you can start tracking events and people:

<?php
// import dependencies
require 'vendor/autoload.php';

// get the Mixpanel class instance, replace with your project token
$mp = Mixpanel::getInstance("MIXPANEL_PROJECT_TOKEN");

// track an event
$mp->track("button clicked", array("label" => "sign-up")); 

// create/update a profile for user id 12345
$mp->people->set(12345, array(
    '$first_name'       => "John",
    '$last_name'        => "Doe",
    '$email'            => "john.doe@example.com",
    '$phone'            => "5555555555",
    "Favorite Color"    => "red"
));

Install Manually

1. Download the Mixpanel PHP Library
2. Extract the zip file to a directory called "mixpanel-php" in your project root
3. Now you can start tracking events and people:

<?php
// import Mixpanel
require 'mixpanel-php/lib/Mixpanel.php';

// get the Mixpanel class instance, replace with your project token
$mp = Mixpanel::getInstance("MIXPANEL_PROJECT_TOKEN");

// track an event
$mp->track("button clicked", array("label" => "sign-up"));

// create/update a profile for user id 12345
$mp->people->set(12345, array(
    '$first_name'       => "John",
    '$last_name'        => "Doe",
    '$email'            => "john.doe@example.com",
    '$phone'            => "5555555555",
    "Favorite Color"    => "red"
));

Production Notes

By default, data is sent using ssl over cURL. This works fine when you're tracking a small number of events or aren't concerned with the potentially blocking nature of the PHP cURL calls. However, this isn't very efficient when you're sending hundreds of events (such as in batch processing). Our library comes packaged with an easy way to use a persistent socket connection for much more efficient writes. To enable the persistent socket, simply pass 'consumer' => 'socket' as an entry in the $options array when you instantiate the Mixpanel class. Additionally, you can contribute your own persistence implementation by creating a custom Consumer.

Testing

mixpanel-php uses phpunit as the testing framework. Please ensure that composer is up to date. To run tests, execute composer run-script unit-tests on the root directory.

Documentation

• Reference Docs
• Full API Reference

For further examples and options checkout out the "examples" folder

Changelog

Version 2.11.0

• Fix identify regex for $anon_id
• Fix PHP 8.2 deprecation warning

Version 2.10.0

• send millisecond precision timestamps

Version 2.9.0

• update regex for $anon_id check
• Group Analytics Support
• Fix PHP 8.1 deprecation warning
• PHP 7.4 compatibility

Version 2.8.1

• Updated $anon_id regex in identify method to support all Mixpanel distinct IDs

Version 2.8.0

• Added $anon_id parameter to identify method, and a track call when parameter exists and is in UUID v4 format
• Change parameter names for createAlias method to $distinct_id and $alias
• Prevent unnecessary call to _encode on non-forked CurlConsumer
• make sure 'Connection' exists before accessing it

Version 2.7.0:

• Dropped test support for EOL PHP version (all < 7.1)
• Added Parallel cURL implementation
• Make createAlias adhere to the consumer config
• Added option to set $ignore_alias on people updates
• Fixed Singleton instance must depend on requested token
• Fixed license type in composer.json
• Remove testing on HHVM as its no longer support by composer

Version 2.6.2:

• Added support for $ignore_time
• Cleaned up some comments to be more clear

Version 2.6.1:

• Fixed bug in SocketConsumer timeout

Version 2.6:

• Updated default for connect_timeout in SocketConsumer to be 5

Version 2.5:

• timeout option now refers to CURLOPT_TIMEOUT instead of CURLOPT_CONNECTTIMEOUT in non-forked cURL calls, it has been removed from the SocketConsumer in favor of a new connect_timeout option.
• Added a new connect_timeout option for CURLOPT_CONNECTTIMEOUT in non-forked cURL calls (CurlConsumer) and the socket timeout (SocketConsumer)
• Set default timeout (CURLOPT_TIMEOUT) to 30 seconds in non-forked cURL calls
• Set default connection timeoute (CURLOPT_CONNECTTIMEOUT) to 5 seconds in non-forked cURL calls
• We now pass cURL errors from non-forked cURL calls to _handle_error with the curl errno and message

Version 2.4:

• Fixed a bug where passing the integer 0 for the ip parameter would be ignored

Version 2.1 - 2.3:

• Broken releases

Version 2.0:

• Changed the default consumer to be 'curl' (CurlConsumer)
• Changed the default setting of 'fork' to false in the Curl Consumer. This means that by default, events and profile updates are sent synchronously using the PHP cURL lib when using the Curl Consumer.
• 'createAlias' uses the CurlConsumer with 'fork' explicitly set to false (as we need this to be synchronous) instead of the SocketConsumer.
• Fixed bug where max_queue_size was never read