diff --git a/doc/languages-frameworks/php.section.md b/doc/languages-frameworks/php.section.md
index 83520ae8c5f6..9f221679ce22 100644
--- a/doc/languages-frameworks/php.section.md
+++ b/doc/languages-frameworks/php.section.md
@@ -9,7 +9,7 @@ wide variety of extensions and libraries available.
 
 The different versions of PHP that nixpkgs provides are located under
 attributes named based on major and minor version number; e.g.,
-`php81` is PHP 8.1.
+`php84` is PHP 8.4.
 
 Only versions of PHP that are supported by upstream for the entirety
 of a given NixOS release will be included in that release of
@@ -22,8 +22,8 @@ NixOS - not necessarily the latest major release from upstream.
 
 All available PHP attributes are wrappers around their respective
 binary PHP package and provide commonly used extensions this way. The
-real PHP 8.1 package, i.e. the unwrapped one, is available as
-`php81.unwrapped`; see the next section for more details.
+real PHP 8.4 package, i.e. the unwrapped one, is available as
+`php84.unwrapped`; see the next section for more details.
 
 Interactive tools built on PHP are put in `php.packages`; composer is
 for example available at `php.packages.composer`.
diff --git a/nixos/doc/manual/release-notes/rl-2511.section.md b/nixos/doc/manual/release-notes/rl-2511.section.md
index 7203addaa835..517beed6d0a4 100644
--- a/nixos/doc/manual/release-notes/rl-2511.section.md
+++ b/nixos/doc/manual/release-notes/rl-2511.section.md
@@ -328,6 +328,8 @@
 
   Note that system activation will complete before all certificates may have been renewed or acquired.
 
+- `php81` was removed.
+
 - `libvirt` now supports using `nftables` backend.
   - The `virtualisation.libvirtd.firewallBackend` option can be used to configure the firewall backend used by libvirtd.
 
diff --git a/nixos/tests/all-tests.nix b/nixos/tests/all-tests.nix
index a4a8599a173c..6a98334eb836 100644
--- a/nixos/tests/all-tests.nix
+++ b/nixos/tests/all-tests.nix
@@ -1171,10 +1171,6 @@ in
     inherit runTest;
     php = pkgs.php;
   };
-  php81 = import ./php/default.nix {
-    inherit runTest;
-    php = pkgs.php81;
-  };
   php82 = import ./php/default.nix {
     inherit runTest;
     php = pkgs.php82;
diff --git a/pkgs/development/interpreters/php/8.1.nix b/pkgs/development/interpreters/php/8.1.nix
deleted file mode 100644
index cc5fef956dcf..000000000000
--- a/pkgs/development/interpreters/php/8.1.nix
+++ /dev/null
@@ -1,59 +0,0 @@
-{ callPackage, fetchpatch, ... }@_args:
-
-let
-  base = callPackage ./generic.nix (
-    (removeAttrs _args [ "fetchpatch" ])
-    // {
-      version = "8.1.33";
-      hash = "sha256-tlU0UYQcGlaYZdf9yDAkYh7kQ0zY+/6woxWIrJxwaF8=";
-    }
-  );
-in
-base.withExtensions (
-  { all, ... }:
-  with all;
-  ([
-    bcmath
-    calendar
-    curl
-    ctype
-    dom
-    exif
-    fileinfo
-    filter
-    ftp
-    gd
-    gettext
-    gmp
-    iconv
-    imap
-    intl
-    ldap
-    mbstring
-    mysqli
-    mysqlnd
-    opcache
-    openssl
-    pcntl
-    pdo
-    pdo_mysql
-    pdo_odbc
-    pdo_pgsql
-    pdo_sqlite
-    pgsql
-    posix
-    readline
-    session
-    simplexml
-    sockets
-    soap
-    sodium
-    sysvsem
-    sqlite3
-    tokenizer
-    xmlreader
-    xmlwriter
-    zip
-    zlib
-  ])
-)
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index 4b326d227f8e..b9bd4de8e85d 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -2039,6 +2039,9 @@ mapAliases {
   pgadmin = pgadmin4; # Added 2022-01-14
   pharo-spur64 = pharo; # Added 2022-08-03
   phlare = throw "'phlare' has been removed as the upstream project was archived."; # Added 2025-03-27
+  php81 = throw "php81 is EOL";
+  php81Extensions = php81;
+  php81Packages = php81;
   picom-next = picom; # Added 2024-02-13
   pict-rs_0_3 = throw "pict-rs_0_3 has been removed, as it was an outdated version and no longer compiled"; # Added 2024-08-20
   pidgin-mra = throw "'pidgin-mra' has been removed since mail.ru agent service has stopped functioning in 2024."; # Added 2025-09-17
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 8f8c5ebc24aa..5c2abeee554e 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -6019,16 +6019,6 @@ with pkgs;
   php82Extensions = recurseIntoAttrs php82.extensions;
   php82Packages = recurseIntoAttrs php82.packages;
 
-  # Import PHP81 interpreter, extensions and packages
-  php81 = callPackage ../development/interpreters/php/8.1.nix {
-    stdenv = if stdenv.cc.isClang then llvmPackages.stdenv else stdenv;
-    pcre2 = pcre2.override {
-      withJitSealloc = false; # See https://bugs.php.net/bug.php?id=78927 and https://bugs.php.net/bug.php?id=78630
-    };
-  };
-  php81Extensions = recurseIntoAttrs php81.extensions;
-  php81Packages = recurseIntoAttrs php81.packages;
-
   polyml = callPackage ../development/compilers/polyml { };
   polyml56 = callPackage ../development/compilers/polyml/5.6.nix { };
   polyml57 = callPackage ../development/compilers/polyml/5.7.nix { };