PHP Class Aws\Credentials\CredentialProvider


use Aws\Credentials\CredentialProvider;
$provider = CredentialProvider::defaultProvider();
Returns a CredentialsInterface or throws.
$creds = $provider()->wait();

Credential providers can be composed to create credentials using conditional logic that can create different credentials in different environments. You can compose multiple providers into a single provider using {@see \Aws\Credentials\CredentialProvider::chain}. This function accepts providers as variadic arguments and returns a new function that will invoke each provider until a successful set of credentials is returned.


First try an INI file at this location.
$a = CredentialProvider::ini(null, '/path/to/file.ini');
Then try an INI file at this location.
$b = CredentialProvider::ini(null, '/path/to/other-file.ini');
Then try loading from environment variables.
$c = CredentialProvider::env();
Combine the three providers together.
$composed = CredentialProvider::chain($a, $b, $c);
Returns a promise that is fulfilled with credentials or throws.
$promise = $composed();
Wait on the credentials to resolve.
$creds = $promise->wait();

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Public Methods

Method	Description
cache ( callable $provider, Aws\CacheInterface $cache, string \| null $cacheKey = null ) : callable	Wraps a credential provider and saves provided credentials in an instance of Aws\CacheInterface. Forwards calls when no credentials found in cache and updates cache with the results.
chain ( ) : callable	Creates an aggregate credentials provider that invokes the provided variadic providers one after the other until a provider returns credentials.
defaultProvider ( array $config = [] ) : callable	Create a default credential provider that first checks for environment variables, then checks for the "default" profile in ~/.aws/credentials, then tries to make GET Request to fetch credentials if Ecs environment variable is presented, and finally checks for EC2 instance profile credentials.
ecsCredentials ( array $config = [] ) : EcsCredentialProvider	Credential provider that creates credentials using ecs credentials by a GET request, whose uri is specified by environment variable
env ( ) : callable	Provider that creates credentials from environment variables AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, and AWS_SESSION_TOKEN.
fromCredentials ( Aws\Credentials\CredentialsInterface $creds ) : callable	Create a credential provider function from a set of static credentials.
ini ( string \| null $profile = null, string \| null $filename = null ) : callable	Credentials provider that creates credentials using an ini file stored in the current user's home directory.
instanceProfile ( array $config = [] ) : Aws\Credentials\InstanceProfileProvider	Credential provider that creates credentials using instance profile credentials.
memoize ( callable $provider ) : callable	Wraps a credential provider and caches previously provided credentials.

Private Methods

Method	Description
getHomeDir ( ) : null \| string	Gets the environment's HOME directory if available.
reject ( $msg )

Method Details

cache() public static method

Defaults to using a simple file-based cache when none provided.

public static cache ( callable $provider, Aws\CacheInterface $cache, string \| null $cacheKey = null ) : callable
$provider	callable	Credentials provider function to wrap
$cache	Aws\CacheInterface	Cache to store credentials
$cacheKey	string \| null	(optional) Cache key to use
return	callable

chain() public static method

Creates an aggregate credentials provider that invokes the provided variadic providers one after the other until a provider returns credentials.

public static chain ( ) : callable
return	callable

defaultProvider() public static method

This provider is automatically wrapped in a memoize function that caches previously provided credentials.

public static defaultProvider ( array $config = [] ) : callable
$config	array	Optional array of instance profile credentials provider options.
return	callable

ecsCredentials() public static method

Credential provider that creates credentials using ecs credentials by a GET request, whose uri is specified by environment variable

See also: Aws\Credentials\EcsCredentialProvider for $config details.

public static ecsCredentials ( array $config = [] ) : EcsCredentialProvider
$config	array	Array of configuration data.
return	EcsCredentialProvider

env() public static method

Provider that creates credentials from environment variables AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, and AWS_SESSION_TOKEN.

public static env ( ) : callable
return	callable

fromCredentials() public static method

Create a credential provider function from a set of static credentials.

public static fromCredentials ( Aws\Credentials\CredentialsInterface $creds ) : callable
$creds	Aws\Credentials\CredentialsInterface
return	callable

ini() public static method

Credentials provider that creates credentials using an ini file stored in the current user's home directory.

public static ini ( string \| null $profile = null, string \| null $filename = null ) : callable
$profile	string \| null	Profile to use. If not specified will use the "default" profile.
$filename	string \| null	If provided, uses a custom filename rather than looking in the home directory for the
return	callable

instanceProfile() public static method

Credential provider that creates credentials using instance profile credentials.

See also: Aws\Credentials\InstanceProfileProvider for $config details.

public static instanceProfile ( array $config = [] ) : Aws\Credentials\InstanceProfileProvider
$config	array	Array of configuration data.
return	Aws\Credentials\InstanceProfileProvider

memoize() public static method

Ensures that cached credentials are refreshed when they expire.

public static memoize ( callable $provider ) : callable
$provider	callable	Credentials provider function to wrap.
return	callable