LaunchDarkly PHP SDK 4.2.0

LDClient
in package

A client for the LaunchDarkly API.

Table of Contents

DEFAULT_BASE_URI  = 'https://sdk.launchdarkly.com'
DEFAULT_EVENTS_URI  = 'https://events.launchdarkly.com'
VERSION  = '4.2.0'
The current SDK version.
__construct()  : LDClient
Creates a new client instance that connects to LaunchDarkly.
alias()  : void
Associates two users for analytics purposes.
allFlagsState()  : FeatureFlagsState
Returns an object that encapsulates the state of all feature flags for a given user.
flush()  : bool
Publishes any pending analytics events to LaunchDarkly.
identify()  : void
Reports details about a user.
isOffline()  : bool
Returns whether the LaunchDarkly client is in offline mode.
secureModeHash()  : string
Generates an HMAC sha256 hash for use in Secure mode.
track()  : void
Tracks that a user performed an event.
variation()  : mixed
Calculates the value of a feature flag for a given user.
variationDetail()  : EvaluationDetail
Calculates the value of a feature flag, and returns an object that describes the way the value was determined.

Constants

DEFAULT_BASE_URI

public string DEFAULT_BASE_URI = 'https://sdk.launchdarkly.com'

DEFAULT_EVENTS_URI

public string DEFAULT_EVENTS_URI = 'https://events.launchdarkly.com'

VERSION

The current SDK version.

public string VERSION = '4.2.0'

Methods

__construct()

Creates a new client instance that connects to LaunchDarkly.

public __construct(string $sdkKey[, array<string|int, mixed> $options = [] ]) : LDClient
Parameters
$sdkKey : string

The SDK key for your account

$options : array<string|int, mixed> = []

Client configuration settings

  • base_uri: Base URI of the LaunchDarkly service. Change this if you are connecting to a Relay Proxy instance instead of directly to LaunchDarkly.
  • events_uri: Base URI for sending events to LaunchDarkly. Change this if you are forwarding events through a Relay Proxy instance.
  • timeout: The maximum length of an HTTP request in seconds. Defaults to 3.
  • connect_timeout: The maximum number of seconds to wait while trying to connect to a server. Defaults to 3.
  • cache: An optional implementation of Guzzle's CacheStorageInterface. Defaults to an in-memory cache.
  • send_events: If set to false, disables the sending of events to LaunchDarkly. Defaults to true.
  • logger: An optional implementation of Psr\Log\LoggerInterface. Defaults to a Monolog\Logger sending all messages to the PHP error_log.
  • offline: If set to true, disables all network calls and always returns the default value for flags. Defaults to false.
  • feature_requester: An optional FeatureRequester implementation, or a class or factory for one. Defaults to Guzzle::featureRequester(). There are also optional packages providing database integrations; see Storing data.
  • feature_requester_class: Deprecated, equivalent to feature_requester.
  • event_publisher: An optional EventPublisher implementation, or a class or factory for one. Defaults to Curl::eventPublisher().
  • event_publisher_class: Deprecated, equivalent to event_publisher.
  • all_attributes_private: If set to true, no user attributes (other than the key) will be sent back to LaunchDarkly. Defaults to false.
  • private_attribute_names: An optional array of user attribute names to be marked private. Any users sent to LaunchDarkly with this configuration active will have attributes with these names removed. You can also set private attributes on a per-user basis in LDUserBuilder.
  • Other options may be available depending on any features you are using from the LaunchDarkly\Integrations namespace.
Return values
LDClient —

alias()

Associates two users for analytics purposes.

public alias(LDUser $user, LDUser $previousUser) : void

This can be helpful in the situation where a person is represented by multiple LaunchDarkly users. This may happen, for example, when a person initially logs into an application-- the person might be represented by an anonymous user prior to logging in and a different user after logging in, as denoted by a different user key.

Parameters
$user : LDUser

the newly identified user.

$previousUser : LDUser

the previously identified user.

Return values
void —

allFlagsState()

Returns an object that encapsulates the state of all feature flags for a given user.

public allFlagsState(LDUser $user[, array<string|int, mixed> $options = [] ]) : FeatureFlagsState

This includes the flag values as well as other flag metadata that may be needed by front-end code, since the most common use case for this method is bootstrapping in conjunction with the JavaScript browser SDK.

This method does not send analytics events back to LaunchDarkly.

Parameters
$user : LDUser

The end user requesting the feature flags

$options : array<string|int, mixed> = []

Optional properties affecting how the state is computed:

  • clientSideOnly: Set this to true to specify that only flags marked for client-side use should be included; by default, all flags are included
  • withReasons: Set this to true to include evaluation reasons (see LDClient::variationDetail())
  • detailsOnlyForTrackedFlags: Set to true to omit any metadata that is normally only used for event generation, such as flag versions and evaluation reasons, unless the flag has event tracking or debugging turned on
Return values
FeatureFlagsState —

a FeatureFlagsState object (will never be null)

flush()

Publishes any pending analytics events to LaunchDarkly.

public flush() : bool

This is normally done automatically by the SDK.

Return values
bool —

Whether the events were successfully published

identify()

Reports details about a user.

public identify(LDUser $user) : void

This simply registers the given user properties with LaunchDarkly without evaluating a feature flag. This also happens automatically when you evaluate a flag.

Parameters
$user : LDUser

The user properties

Return values
void —

isOffline()

Returns whether the LaunchDarkly client is in offline mode.

public isOffline() : bool
Return values
bool —

secureModeHash()

Generates an HMAC sha256 hash for use in Secure mode.

public secureModeHash(LDUser $user) : string

See: Secure mode

Parameters
$user : LDUser
Return values
string —

track()

Tracks that a user performed an event.

public track(string $eventName, LDUser $user[, mixed $data = null ][, numeric $metricValue = null ]) : void
Parameters
$eventName : string

The name of the event

$user : LDUser

The user that performed the event

$data : mixed = null

Optional additional information to associate with the event

$metricValue : numeric = null

A numeric value used by the LaunchDarkly experimentation feature in numeric custom metrics. Can be omitted if this event is used by only non-numeric metrics. This field will also be returned as part of the custom event for Data Export.

Return values
void —

variation()

Calculates the value of a feature flag for a given user.

public variation(string $key, LDUser $user[, mixed $default = false ]) : mixed
Parameters
$key : string

The unique key for the feature flag

$user : LDUser

The end user requesting the flag

$default : mixed = false

The default value of the flag

Return values
mixed —

The result of the Feature Flag evaluation, or $default if any errors occurred.

variationDetail()

Calculates the value of a feature flag, and returns an object that describes the way the value was determined.

public variationDetail(string $key, LDUser $user[, mixed $default = false ]) : EvaluationDetail

The "reason" property in the result will also be included in analytics events, if you are capturing detailed event data for this flag.

Parameters
$key : string

The unique key for the feature flag

$user : LDUser

The end user requesting the flag

$default : mixed = false

The default value of the flag

Return values
EvaluationDetail —

An EvaluationDetail object that includes the feature flag value and evaluation reason.

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