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
▶️ PHP 8.4+
array_find()	✅ Full	Function
array_find_key()	✅ Full	Function
array_any()	✅ Full	Function
array_all()	✅ Full	Function
mb_trim() / mb_ltrim() / mb_rtrim()	✅ Full	Function
mb_ucfirst() / mb_lcfirst()	✅ Full	Function
bcdivmod()	✅ Full	Function
fpow()	✅ Full	Function
grapheme_str_split()	✅ Full	Function
bcceil()	✅ Full	Function
bcfloor()	✅ Full	Function
bcround()	✅ Full	Function
PHP_SBINDIR	✅ Full	Constant
CURL_HTTP_VERSION_3	✅ Full	Constant
CURL_HTTP_VERSION_3ONLY	✅ Full	Constant
Deprecated	✅ Full	Attribute
ReflectionConstant	✅ 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

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

Extension
ext-mbstring
ext-iconv
ext-apcu
ext-ctype
ext-uuid
ext-bcmath
ext-intl

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.