README

Phuture Continuum

A forward-compatibility layer bringing tomorrow’s PHP features to today’s runtimes.

Introduction

Continuum bridges the gap between PHP versions by extending Symfony Polyfill with additional methods, constants, and stubs. Built on Symfony's solid foundation, Continuum provides extra polyfills and graceful fallbacks—enabling you to write forward-compatible code that works consistently across different PHP runtimes.

Features

This package polyfills most common PHP functions from PHP 8.1 to 8.5, designed to be used on PHP 8.0 or later.

Polyfill	Level	Type
▶️ PHP 8.1+
`array_is_list()`	✅ Full	Function
`enum_exists()`	✅ Full	Function
`fsync()`	❇️ Partial	Function
`fdatasync()`	❇️ Partial	Function
`IMAGETYPE_AVIF`	✅ Full	Constant
`IMG_AVIF`	✅ Full	Constant
`IMG_WEBP_LOSSLESS`	✅ Full	Constant
`MYSQLI_REFRESH_REPLICA`	✅ Full	Constant
`T_READONLY`	✅ Full	Constant
`CURLStringFile`	✅ Full	Class
`ReturnTypeWillChange`	✅ Full	Attribute
▶️ PHP 8.2+
`ini_parse_quantity()`	✅ Full	Function
`odbc_connection_string_is_quoted()`	✅ Full	Function
`odbc_connection_string_should_quote()`	✅ Full	Function
`odbc_connection_string_quote()`	✅ Full	Function
`curl_upkeep()`	❇️ Partial	Function
`memory_reset_peak_usage()`	⚠️ No-op	Function
`mysqli_execute_query()`	✅ Full	Function
`openssl_cipher_key_length()`	✅ Full	Function
`imap_is_open()`	✅ Full	Function
`AllowDynamicProperties`	✅ Full	Attribute
`SensitiveParameter`	✅ Full	Attribute
`SensitiveParameterValue`	✅ Full	Class
`Random\Engine`	✅ Full	Interface
`Random\CryptoSafeEngine`	✅ Full	Interface
`Random\Engine\Secure`	✅ Full	Class
▶️ PHP 8.3+
`json_validate()`	✅ Full	Function
`mb_str_pad()`	✅ Full	Function
`str_increment()`	✅ Full	Function
`str_decrement()`	✅ Full	Function
`stream_context_set_options()`	✅ Full	Function
`posix_eaccess()`	✅ Full	Function
`POSIX_PC_*` (10 constants)	✅ Full	Constant
`POSIX_*_OK` (4 constants)	✅ Full	Constant
`Override`	✅ Full	Attribute
`DateError` / `DateException` (and related)	✅ Full	Class
`SQLite3Exception`	✅ Full	Class
`ldap_exop_sync()`	✅ Full	Function
`ldap_connect_wallet()`	✅ Full	Function
▶️ PHP 8.4+
`array_find()`	✅ Full	Function
`array_find_key()`	✅ Full	Function
`array_any()`	✅ Full	Function
`array_all()`	✅ Full	Function
`fpow()`	✅ Full	Function
`grapheme_str_split()`	✅ Full	Function
`PHP_SBINDIR`	✅ Full	Constant
`CURL_HTTP_VERSION_3`	✅ Full	Constant
`CURL_HTTP_VERSION_3ONLY`	✅ Full	Constant
`Deprecated`	✅ Full	Attribute
`RoundingMode`	✅ Full	Enum
`ReflectionConstant`	✅ Full	Class
`PDO` driver subclasses (Dblib, Firebird, etc.)	✅ Full	Class
▶️ PHP 8.5+
`array_first()`	✅ Full	Function
`array_last()`	✅ Full	Function
`get_error_handler()`	✅ Full	Function
`get_exception_handler()`	✅ Full	Function
`locale_is_right_to_left()`	✅ Full	Function
`grapheme_levenshtein()`	✅ Full	Function
`PHP_BUILD_DATE`	✅ Full	Constant
`PHP_BUILD_PROVIDER`	✅ Full	Constant
`NoDiscard`	✅ Full	Attribute
`DelayedTargetValidation`	✅ Full	Attribute
`Uri\Rfc3986\Uri`	✅ Full	Class
`Uri\WhatWg\Url`	✅ Full	Class
`Uri\WhatWg\InvalidUrlException`	✅ Full	Class
`Uri\WhatWg\UrlValidationError`	✅ Full	Class
`Uri\WhatWg\UrlValidationErrorType`	✅ Full	Class
`Uri\UriException`	✅ Full	Class
`Uri\InvalidUriException`	✅ Full	Class
`Uri\UriComparisonMode`	✅ Full	Class
`Filter\FilterException`	✅ Full	Class
`Filter\FilterFailedException`	✅ Full	Class

This package also provides polyfills for some PHP extensions, allowing better portability across different PHP runtimes.

Extension	Level
`ext-mbstring`	⚠️ Partial
`ext-iconv`	✅ Full
`ext-apcu`	⚠️ Partial
`ext-ctype`	✅ Full
`ext-uuid`	✅ Full
`ext-bcmath`	✅ Full
`ext-intl`	⚠️ Partial

Installation

composer require phuture/continuum

Contributing

Thank you for considering contributing to this project! You can read the Contribution Guide and our Developer Workflow Guide.

Code of Conduct

This project follows a Code of Conduct that all community members and contributors are expected to adhere to our Contributor Code of Conduct.

License

This project is open-source and available under the MIT License.

phuture / continuum

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