PHP 7.4.21: Downloads, Changelog, News

Release Information

PHP Version
PHP 7.4
Release Date
Release Type
Security Update
Release Status
EOL, Use PHP 7.4.33
Branch Status

PHP 7.4 reached EOL on , and all releases of this version no longer receive security or bug fixes. Using PHP 7.4.21 is not recommended. PHP 7.4.33 is the latest version in the series.


Source Code

Git Clone
Use Git to clone the 7.4.21 tag from the PHP Git repository.
git clone --depth 1 --branch php-7.4.21
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:7.4.21-cli-alpine

Debian-based: More compatible with other components, complete, and are widely used.
docker pull php:7.4.21-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:7.4.21-fpm-alpine

Debian-based ZTS Apache: Includes Apache web server integrating PHP as an Apache module.
docker pull php:7.4.21-apache

Debian-based NTS FPM: PHP-FPM, can be integrated with Nginx, Caddy, and other web servers over Fast CGI.
docker pull php:7.4.21-fpm



  • Fixed bug #76359 (open_basedir bypass through adding "..").
  • Fixed bug #81068 (Double free in realpath_cache_clean()).
  • Fixed bug #81070 (Integer underflow in memory limit comparison).
  • Fixed bug #81090 (Typed property performance degradation with .= operator).
  • Fixed bug #81122: SSRF bypass in FILTER_VALIDATE_URL. (CVE-2021-21705)


  • Fixed bug #81092 (fflush before stream_filter_remove corrupts stream).


  • Fixed bug #76694 (native Windows cert verification uses CN as sever name).



  • Fixed bug #81048 (phpinfo(INFO_VARIABLES) "Array to string conversion").

Commit List

Christoph M. Becker

Derick Rethans

Dimitry Andric

  • Fix bug #81068: Fix possible use-after-free in realpath_cache_clean() in 99a208566a

Nikita Popov

Peter van Dommelen

Stanislav Malyshev

Stéphan Kochen

  • Make tests compatible with libxml2 2.9.12 in f3d1e9ed06
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