我正在尝试使用Mixpanel php库，并在用户在我的网站上注册时尝试启动alias（）方法。我在我的function.php中添加以下代码，当我启动mixpanel实例方法时，出现以下错误。我可能做错了什么？
Fatal error: Cannot declare class Mixpanel, because the name is already in use in /opt/bitnami/apps/wordpress/htdocs/wp-content/themes/lib/Mixpanel.php on line 97
functions.php
function on_wp_register_user( $user_id )
{
require_once( get_template_directory() . '/lib/Mixpanel.php');
$mp = Mixpanel::getInstance("------");
$mp->track("My Event");
$mp->people->set(12345, array(
'$first_name' => "John",
'$last_name' => "Doe",
'$email' => "john.doe@example.com",
'$phone' => "5555555555",
'Favorite Color' => "red"
));
}
add_action('user_register', 'on_wp_register_user', 10, 1 );
mixpanel.php
<?php
require_once(get_template_directory() . '/lib/Base/MixpanelBase.php');
require_once(get_template_directory() . '/lib/Producers/MixpanelPeople.php');
require_once(get_template_directory() . '/lib/Producers/MixpanelEvents.php');
class Mixpanel extends Base_MixpanelBase {
/**
* An instance of the MixpanelPeople class (used to create/update profiles)
* @var MixpanelPeople
*/
public $people;
/**
* An instance of the MixpanelEvents class
* @var Producers_MixpanelEvents
*/
private $_events;
/**
* An instance of the Mixpanel class (for singleton use)
* @var Mixpanel
*/
private static $_instance;
/**
* Instantiates a new Mixpanel instance.
* @param $token
* @param array $options
*/
public function __construct($token, $options = array()) {
parent::__construct($options);
$this->people = new Producers_MixpanelPeople($token, $options);
$this->_events = new Producers_MixpanelEvents($token, $options);
}
/**
* Returns a singleton instance of Mixpanel
* @param $token
* @param array $options
* @return Mixpanel
*/
public static function getInstance($token, $options = array()) {
if(!isset(self::$_instance)) {
self::$_instance = new Mixpanel($token, $options);
}
return self::$_instance;
}
/**
* Add an array representing a message to be sent to Mixpanel to the in-memory queue.
* @param array $message
*/
public function enqueue($message = array()) {
$this->_events->enqueue($message);
}
/**
* Add an array representing a list of messages to be sent to Mixpanel to a queue.
* @param array $messages
*/
public function enqueueAll($messages = array()) {
$this->_events->enqueueAll($messages);
}
/**
* Flush the events queue
* @param int $desired_batch_size
*/
public function flush($desired_batch_size = 50) {
$this->_events->flush($desired_batch_size);
}
/**
* Empty the events queue
*/
public function reset() {
$this->_events->reset();
}
/**
* Identify the user you want to associate to tracked events
* @param string|int $user_id
*/
public function identify($user_id) {
$this->_events->identify($user_id);
}
/**
* Track an event defined by $event associated with metadata defined by $properties
* @param string $event
* @param array $properties
*/
public function track($event, $properties = array()) {
$this->_events->track($event, $properties);
}
/**
* Register a property to be sent with every event.
*
* If the property has already been registered, it will be
* overwritten. NOTE: Registered properties are only persisted for the life of the Mixpanel class instance.
* @param string $property
* @param mixed $value
*/
public function register($property, $value) {
$this->_events->register($property, $value);
}
/**
* Register multiple properties to be sent with every event.
*
* If any of the properties have already been registered,
* they will be overwritten. NOTE: Registered properties are only persisted for the life of the Mixpanel class
* instance.
* @param array $props_and_vals
*/
public function registerAll($props_and_vals = array()) {
$this->_events->registerAll($props_and_vals);
}
/**
* Register a property to be sent with every event.
*
* If the property has already been registered, it will NOT be
* overwritten. NOTE: Registered properties are only persisted for the life of the Mixpanel class instance.
* @param $property
* @param $value
*/
public function registerOnce($property, $value) {
$this->_events->registerOnce($property, $value);
}
/**
* Register multiple properties to be sent with every event.
*
* If any of the properties have already been registered,
* they will NOT be overwritten. NOTE: Registered properties are only persisted for the life of the Mixpanel class
* instance.
* @param array $props_and_vals
*/
public function registerAllOnce($props_and_vals = array()) {
$this->_events->registerAllOnce($props_and_vals);
}
/**
* Un-register an property to be sent with every event.
* @param string $property
*/
public function unregister($property) {
$this->_events->unregister($property);
}
/**
* Un-register a list of properties to be sent with every event.
* @param array $properties
*/
public function unregisterAll($properties) {
$this->_events->unregisterAll($properties);
}
/**
* Get a property that is set to be sent with every event
* @param string $property
* @return mixed
*/
public function getProperty($property)
{
return $this->_events->getProperty($property);
}
/**
* Alias an existing id with a different unique id. This is helpful when you want to associate a generated id
* (such as a session id) to a user id or username.
* @param string|int $original_id
* @param string|int $new_id
*/
public function createAlias($original_id, $new_id) {
$this->_events->createAlias($original_id, $new_id);
}
}