PHP 8.4.0alpha1: Downloads, Changelog, News

Release Information

PHP Version
PHP 8.4
Release Date
Release Type
Bug Fix Release
Release Status
QA Release
Branch Status
Upcoming Release

PHP 8.4 is a development version, and is not recommended for production use. PHP 8.4 is scheduled to reach General Availability on 2024-11-21.
PHP 8.4.0alpha2 is the latest QA release in PHP 8.4.


Source Code

Git Clone
Use Git to clone the 8.4.0alpha1 tag from the PHP Git repository.
git clone --depth 1 --branch php-8.4.0alpha1
How to compile PHP
PHP can be compiled by setting up the dependencies, building the configure script (./buildconf), configuring the build ./configure, and running make.
Detailed articles on how to compile PHP are available for Ubuntu/Debian based systems and Fedora/RHEL based systems.

Windows binaries

Non-Thread Safe Builds
Non-Thread Safe (NTS) builds are single-threaded PHP builds. They can be used on web servers that integrate PHP over FastCGI protocol, such as Nginx, Caddy, and IIS.
Thread-Safe Builds
Thread-Safe (TS) builds are multi-thread PHP builds, often used to integrate PHP as a Server API for multithreaded servers. The most common use case is using PHP as an Apache module.

Docker/Podman Containers

PHP CLI Containers images only include the PHP CLI, and no FPM or Apache modules. The Alpine builds are lightweight, but may introduce incompatibilities due to their musl builds. Albeit their larger size, the Debian-based (without the "-alpine" suffix) images are more complete, and widely used.

Alpine-based: Lightweight, but may introduce incompatibilities due to their musl builds.
docker pull php:8.4.0alpha1-cli-alpine

Debian-based: More compatible with other components, complete, and are widely used.
docker pull php:8.4.0alpha1-cli
PHP CLI + Web Server Integration
These container images include PHP CLI, and a web server integration. FPM container images can be integrated with web servers such as Nginx, Caddy, and Apache with Event MPM. The Apache container images include Apache web server, integrating PHP as an Apache module.

Alpine-based: Lightweight, but may introduce incompatibilities due to their musl builds.
docker pull php:8.4.0alpha1-fpm-alpine

Debian-based ZTS Apache: Includes Apache web server integrating PHP as an Apache module.
docker pull php:8.4.0alpha1-apache

Debian-based NTS FPM: PHP-FPM, can be integrated with Nginx, Caddy, and other web servers over Fast CGI.
docker pull php:8.4.0alpha1-fpm



  • [RFC] Add bcfloor, bcceil and bcround to BCMath.
  • Improve performance.


  • Added zend_call_stack_get implementation for NetBSD, DragonFlyBSD, Solaris and Haiku.
  • Enabled ifunc checks on FreeBSD from the 12.x releases.
  • Changed the type of PHP_DEBUG and PHP_ZTS constants to bool.
  • Fixed bug GH-13142 (Undefined variable name is shortened when contains \0).
  • Fixed bug GH-13178 (Iterator positions incorrect when converting packed array to hashed).
  • Fixed zend fiber build for solaris default mode (32 bits).
  • Fixed zend call stack size for macOs/arm64.
  • Added support for Zend Max Execution Timers on FreeBSD.
  • Ensure fiber stack is not backed by THP.
  • Implement GH-13609 (Dump wrapped object in WeakReference class).
  • Added sparc64 arch assembly support for zend fiber.
  • Fixed GH-13581 no space available for TLS on NetBSD.
  • Added fiber Sys-V loongarch64 support.
  • Adjusted closure names to include the parent function's name.
  • Improve randomness of uploaded file names and files created by tempnam().
  • Added gc and shutdown callbacks to zend_mm custom handlers.
  • Fixed bug GH-14650 (Compute the size of pages before allocating memory).
  • Fixed bug GH-11928 (The --enable-re2c-cgoto doesn't add the -g flag).
  • Added the #[\Deprecated] attribute.
  • Fixed GH-11389 (Allow suspending fibers in destructors).


  • Deprecated the CURLOPT_BINARYTRANSFER constant.
  • Bumped required libcurl version to 7.61.0.
  • Added feature_list key to the curl_version() return value.


  • Added DateTime[Immutable]::createFromTimestamp.
  • Added DateTime[Immutable]::[get|set]Microsecond.


  • Added DOMNode::compareDocumentPosition().
  • Implement #53655 (Improve speed of DOMNode::C14N() on large XML documents).
  • Fix cloning attribute with namespace disappearing namespace.
  • Implement DOM HTML5 parsing and serialization RFC.
  • Fix DOMElement->prefix with empty string creates bogus prefix.
  • Handle OOM more consistently.
  • Implemented "Improve callbacks in ext/dom and ext/xsl" RFC.
  • Added DOMXPath::quote() static method.
  • Implemented opt-in ext/dom spec compliance RFC.
  • Fixed bug #79701 (getElementById does not correctly work with duplicate definitions).
  • Implemented "New ext-dom features in PHP 8.4" RFC.
  • Fixed GH-14698 (segfault on DOM node dereference).


  • Update to libmagic 5.45.
  • Fixed bug #65106 (PHP fails to compile ext/fileinfo).


  • Implement GH-12385 (flush headers without body when calling flush()).
  • Added DragonFlyBSD system to the list which set FPM_BACKLOG_DEFAULT to SOMAXCONN.


  • Removed the deprecated inet_ntoa call support.
  • Fixed bug #63937 (Upload speed 10 times slower with PHP).


  • Fix parameter numbers and missing alpha check for imagecolorset().
  • imagepng/imagejpeg/imagewep/imageavif now throw an exception on invalid quality parameter.


  • bind_textdomain_codeset, textdomain and d(*)gettext functions now throw an exception on empty domain.


  • Changed return type of hash_update() to true.
  • Added HashContext::__debugInfo().


  • Moved to PECL.


  • Added IntlDateFormatter::PATTERN constant.
  • Fixed Numberformatter::__construct when the locale is invalid, now throws an exception.
  • Added NumberFormatter::ROUND_TOWARD_ZERO and ::ROUND_AWAY_FROM_ZERO as aliases for ::ROUND_DOWN and ::ROUND_UP.
  • Added NumberFormatter::ROUND_HALFODD.
  • Added IntlDateFormatter::getIanaID/intltz_get_iana_id method/function.
  • Set to C++17 standard for icu 74 and onwards.
  • resourcebundle_get(), ResourceBundle::get(), and accessing offsets on a ResourceBundle object now throw: - TypeError for invalid offset types - ValueError for an empty string - ValueError if the integer index does not fit in a signed 32 bit integer
  • ResourceBundle::get() now has a tentative return type of: ResourceBundle|array|string|int|null
  • Added the new Grapheme function grapheme_str_split.
  • Added IntlDateFormatter::parseToCalendar.




  • Added LIBXML_RECOVER constant.
  • libxml_set_streams_context() now throws immediately on an invalid context instead of at the use-site.


  • Added mb_trim, mb_ltrim and mb_rtrim.
  • Added mb_ucfirst and mb_lcfirst.
  • Updated Unicode data tables to Unicode 15.1.


  • Fixed bug GH-13440 (PDO quote bottleneck).
  • Fixed bug GH-10599 (Apache crash on Windows when using a self-referencing anonymous function inside a class with an active mysqli connection).


  • Added large shared segments support for FreeBSD.
  • If JIT is enabled, PHP will now exit with a fatal error on startup in case of JIT startup initialization issues.
  • Increased the maximum value of opcache.interned_strings_buffer to 32767 on 64bit archs.
  • Fixed bug GH-13834 (Applying non-zero offset 36 to null pointer in zend_jit.c).
  • Fixed bug GH-14361 (Deep recursion in zend_cfg.c causes segfault).


  • Fixed bug #80269 (OpenSSL sets Subject wrong with extraattribs parameter).
  • Implement request #48520 (openssl_csr_new - allow multiple values in DN).
  • Introduced new serial_hex parameter to openssl_csr_sign.
  • Bumped minimum required OpenSSL version to 1.1.1.
  • Added compile-time option --with-openssl-legacy-provider to enable legacy provider.
  • Added support for Curve25519 + Curve448 based keys.
  • Fixed bug GH-13343 (openssl_x509_parse should not allow omitted seconds in UTCTimes).


  • Clear output handler status flags during handler initialization.
  • Fixed bug with url_rewriter.hosts not used by output_add_rewrite_var().


  • Added pcntl_setns for Linux.
  • Added pcntl_getaffinity/pcntl_setaffinity.
  • Updated pcntl_get_signal_handler signal id upper limit to be more in line with platforms limits.
  • Added pcntl_getcpu for Linux/FreeBSD/Solaris/Illumos.
  • Added pcntl_getqos_class/pcntl_setqos_class for macOs.
  • Added SIGCKPT/SIGCKPTEXIT constants for DragonFlyBSD.
  • Added FreeBSD's SIGTRAP handling to pcntl_siginfo_to_zval.
  • Added POSIX pcntl_waitid.


  • Upgrade bundled pcre2lib to version 10.43.
  • Add "/r" modifier.
  • Upgrade bundled pcre2lib to version 10.44.


  • Fixed setAttribute and getAttribute.
  • Implemented PDO driver-specific subclasses RFC.
  • Added support for PDO driver-specific SQL parsers.


  • Fixed setAttribute and getAttribute.
  • Added class Pdo\DbLib.


  • Fixed setAttribute and getAttribute.
  • Feature: Add transaction isolation level and mode settings to pdo_firebird.
  • Added class Pdo\Firebird.


  • Fixed setAttribute and getAttribute.
  • Added class Pdo\Mysql.
  • Added custom SQL parser.


  • Added class Pdo\Odbc.


  • Fixed GH-12423, DSN credentials being prioritized over the user/password PDO constructor arguments.
  • Fixed native float support with pdo_pgsql query results.
  • Added class Pdo\Pgsql.
  • Retrieve the memory usage of the query result resource.
  • Added Pdo`Pgsql::setNoticeCallBack` method to receive DB notices.
  • Added custom SQL parser.


  • Added class Pdo\Sqlite.
  • Fixed bug #81227 (PDO::inTransaction reports false when in transaction).
  • Added custom SQL parser.


  • Added the possibility to have no conditions for pg_select.
  • Persistent connections support the PGSQL_CONNECT_FORCE_RENEW flag.
  • Added pg_result_memory_size to get the query result memory usage.
  • Added pg_change_password to alter an user's password.
  • Added pg_put_copy_data/pg_put_copy_end to send COPY commands and signal the end of the COPY.
  • Added pg_socket_poll to poll on the connection.
  • Added pg_jit to get infos on server JIT support.
  • Added pg_set_chunked_rows_size to fetch results per chunk.


  • Fixed bug GH-12532 (PharData created from zip has incorrect timestamp).


  • Added POSIX_SC_CHILD_MAX and POSIX_SC_CLK_TCK constants.
  • Updated posix_isatty to set the error number on file descriptors.


  • Moved to PECL.


  • Implement GH-12908 (Show attribute name/class in ReflectionAttribute dump).
  • Make ReflectionGenerator::getFunction() legal after generator termination.
  • Added ReflectionGenerator::isClosed().


  • Fixed bug GH-12192 (SimpleXML infinite loop when getName() is called within foreach).
  • Fixed bug GH-12208 (SimpleXML infinite loop when a cast is used inside a foreach).
  • Fixed bug #55098 (SimpleXML iteration produces infinite loop).
  • Fix signature of simplexml_import_dom().


  • Added multicast group support for ipv4 on FreeBSD. (
  • Added the TCP_SYNCNT constant for Linux to set number of attempts to send SYN packets from the client.
  • Added the SO_EXCLBIND constant for exclusive socket binding on illumos/solaris.
  • Updated the socket_create_listen backlog argument default value to SOMAXCONN.
  • Added the SO_NOSIGPIPE constant to control the generation of SIGPIPE for macOs and FreeBSD.
  • Added SO_LINGER_SEC for macOs, true equivalent of SO_LINGER in other platforms.
  • Add close-on-exec on socket created with socket_accept on unixes.
  • Removed the deprecated inet_ntoa call support.
  • Added the SO_EXECLUSIVEADDRUSE windows constant.
  • Added the SOCK_CONN_DGRAM/SOCK_DCCP netbsd constants.


  • Removed the deprecated inet_ntoa call support.


  • Add support for clark notation for namespaces in class map.
  • Mitigate #51561 (SoapServer with a extented class and using sessions, lost the setPersistence()).
  • Fixed bug #49278 (SoapClient::__getLastResponseHeaders returns NULL if wsdl operation !has output).
  • Fixed bug #44383 (PHP DateTime not converted to xsd:datetime).
  • Fixed bug GH-11941 (soap with session persistence will silently fail when "session" built as a shared object).


  • Add support for AEGIS-128L and AEGIS-256.
  • Enable AES-GCM on aarch64 with the ARM crypto extensions.


  • Implement SeekableIterator for SplObjectStorage.


  • Implement GH-12188 (Indication for the int size in phpinfo()).
  • Partly fix GH-12143 (Incorrect round() result for 0.49999999).
  • Fix GH-12252 (round(): Validate the rounding mode).
  • Increase the default BCrypt cost to 12.
  • Fixed bug GH-12592 (strcspn() odd behaviour with NUL bytes and empty mask).
  • Removed the deprecated inet_ntoa call support.
  • Cast large floats that are within int range to int in number_format so the precision is not lost.
  • Add support for 4 new rounding modes to the round() function.
  • debug_zval_dump() now indicates whether an array is packed.
  • Fix GH-12143 (Optimize round).
  • Changed return type of long2ip to string from string|false.
  • Fix GH-12143 (Extend the maximum precision round can handle by one digit).
  • Added the http_get_last_response_headers() and http_clear_last_response_headers() that allows retrieving the same content as the magic $http_response_header variable.
  • Add php_base64_encode_ex() API.
  • Implemented "Raising zero to the power of negative number" RFC.
  • Added array_find(), array_find_key(), array_all(), and array_any().


  • Added XML_OPTION_PARSE_HUGE parser option.


  • Declares class constant types.
  • Add XMLReader::fromStream(), XMLReader::fromUri(), XMLReader::fromString().


  • Add XMLWriter::toStream(), XMLWriter::toUri(), XMLWriter::toMemory().


  • Implement request #64137 (XSLTProcessor::setParameter() should allow both quotes to be used).
  • Implemented "Improve callbacks in ext/dom and ext/xsl" RFC.
  • Added XSLTProcessor::$maxTemplateDepth and XSLTProcessor::$maxTemplateVars.
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