OptimizelyUserContext for the PHP SDK

class OptimizelyUserContext implements \JsonSerializable
{
    // Create an instance of the Optimizely User Context. Pass in user id and optionally user attributes 
    public function __construct(Optimizely $optimizelyClient, $userId, array $attributes = [], $forcedDecisions = null);
    
    // get user id for the user
    public function getUserId();

    // set user attributes
    public function setAttribute($key, $value);
  
    // get user attributes
    public function getAttributes();

    // make a decision about which flag variation the user buckets into for the flag key
    public function decide($key, array $options = []);

    // make decisions about which flag variations the user buckets into for flag keys 
    public function decideForKeys(array $keys, array $options = []);

    // make decisions about which flag variations the user buckets into for all flags 
    public function decideAll(array $options = []);

    // track user event
    public function trackEvent($eventKey, array $eventTags = []);
    
    // Sets the forced decision (variationKey) for a given decision context
    public function setForcedDecision($context, $decision);

    // Returns the forced decision for a given decision context
    public function getForcedDecision($context);

    // Removes the forced decision for a given decision context
    public function removeForcedDecision($context);

    // Removes all forced decisions bound to this user context
    public function removeAllForcedDecisions();
}