Explore PHP Standard Library 6.0.0: New Repo, 61 Split Packages & Key Features

PHP Standard Library 6.0.0

This is the largest release of the PHP Standard Library (PSL) to date, featuring a new repository location, new package structure, and many new functionalities.

New Addresses

Repository : https://github.com/php-standard-library/php-standard-library (formerly azjezz/psl)

Website : https://php-standard-library.dev/ (formerly psl.carthage.software)

Packagist : php-standard-library/php-standard-library (formerly azjezz/psl)

The old azjezz/psl package is deprecated; switch with:

composer require php-standard-library/php-standard-library

The namespace remains Psl\.

61 Independent Packages

PSL is now split into 61 installable packages, allowing selective installation.

Only want type‑safe casting? → composer require php-standard-library/type Need an async TCP server? → composer require php-standard-library/tcp Need URI handling? → composer require php-standard-library/uri Each package declares only its required dependencies. To install the full suite:

composer require php-standard-library/php-standard-library

All 61 packages are hosted under the php-standard-library GitHub organization, each with a read‑only split repository for Composer.

New Important Components

URI / IRI / URL Handling

URI : RFC 3986 parsing, normalization, reference resolution, RFC 6570 URI Template (levels 1‑4)

IRI : RFC 3987 internationalized identifiers, Unicode, Punycode, IDNA 2008

URL : Strict URL type with scheme/authority validation and automatic default‑port stripping

Punycode

Standalone RFC 3492 Punycode encoder/decoder for internationalized domain names.

New Cancellation Mechanism (Cancellation Tokens)

Replaces the previous Duration $timeout parameter; all async/IO operations now use a unified cancellation token. CancellationTokenInterface – base interface TimeoutCancellationToken – automatic timeout cancellation SignalCancellationToken – manual cancellation LinkedCancellationToken – cancels when any child token cancels

Other Highlights

TaskGroup

and WaitGroup – structured concurrency support

QuotedPrintable and EncodedWord encoding (RFC 2045/2047)

Stream‑compatible Base64 / Hex / QuotedPrintable IO handles TLS\Listener – wrap any listener with TLS TCP\RestrictedListener – IP/CIDR based access control Network\CompositeListener – listen on multiple addresses simultaneously

New methods readByte(), readLine(), readUntil() on BufferedReadHandleInterface TCP, Unix, UDP, Socks now use configuration objects instead of parameter arrays

Breaking Changes

Cancellation mechanism replaces timeout parameter:

// 5.x style
$data = $reader->read(timeout: Duration::seconds(5));

// 6.0 style
$data = $reader->read(cancellation: new Async\TimeoutCancellationToken(Duration::seconds(5)));

Naming convention unified to camelCase for variables, parameters, and properties.

Configuration objects replace loose parameter lists for TCP\listen(), TCP\connect(), Unix\listen(), UDP\Socket::bind(), Socks\Connector, etc.

Timeout exceptions removed; use Async\Exception\CancelledException instead.

TLS class names changed: TLS\ServerConfig → TLS\ServerConfiguration, TLS\ClientConfig → TLS\ClientConfiguration.

Bug Fixes

RetryConnector back‑off sleep now respects cancellation token.

IO\write(), IO\write_line(), Str\format() no longer crash when a format string contains “%” without parameters.