diff --git a/.evergreen/config/generate-config.php b/.evergreen/config/generate-config.php
index c39a10829..f8d8e6e43 100755
--- a/.evergreen/config/generate-config.php
+++ b/.evergreen/config/generate-config.php
@@ -3,6 +3,7 @@
 
 // Supported PHP versions. Add new versions to the beginning of the list
 $supportedPhpVersions = [
+    '8.5',
     '8.4',
     '8.3',
     '8.2',
diff --git a/.evergreen/config/generated/build/build-extension.yml b/.evergreen/config/generated/build/build-extension.yml
index 7714a3d3b..d67ec54d6 100644
--- a/.evergreen/config/generated/build/build-extension.yml
+++ b/.evergreen/config/generated/build/build-extension.yml
@@ -1,5 +1,43 @@
 # This file is generated automatically - please edit the "templates/build/build-extension.yml" template file instead.
 tasks:
+  - name: "build-php-8.5"
+    tags: ["build", "php8.5", "stable", "pr", "tag"]
+    commands:
+      - func: "locate PHP binaries"
+        vars:
+          PHP_VERSION: "8.5"
+      - func: "compile extension"
+      - func: "upload extension"
+  - name: "build-php-8.5-lowest"
+    tags: ["build", "php8.5", "lowest", "pr", "tag"]
+    commands:
+      - func: "locate PHP binaries"
+        vars:
+          PHP_VERSION: "8.5"
+      - func: "compile extension"
+        vars:
+          EXTENSION_VERSION: "2.2.0"
+      - func: "upload extension"
+  - name: "build-php-8.5-next-stable"
+    tags: ["build", "php8.5", "next-stable", "pr", "tag"]
+    commands:
+      - func: "locate PHP binaries"
+        vars:
+          PHP_VERSION: "8.5"
+      - func: "compile extension"
+        vars:
+          EXTENSION_BRANCH: "v2.2"
+      - func: "upload extension"
+  - name: "build-php-8.5-next-minor"
+    tags: ["build", "php8.5", "next-minor"]
+    commands:
+      - func: "locate PHP binaries"
+        vars:
+          PHP_VERSION: "8.5"
+      - func: "compile extension"
+        vars:
+          EXTENSION_BRANCH: "v2.x"
+      - func: "upload extension"
   - name: "build-php-8.4"
     tags: ["build", "php8.4", "stable", "pr", "tag"]
     commands:
diff --git a/.evergreen/config/generated/test-variant/modern-php-full.yml b/.evergreen/config/generated/test-variant/modern-php-full.yml
index 1186c35a5..237eca837 100644
--- a/.evergreen/config/generated/test-variant/modern-php-full.yml
+++ b/.evergreen/config/generated/test-variant/modern-php-full.yml
@@ -1,6 +1,64 @@
 # This file is generated automatically - please edit the "templates/test-variant/modern-php-full.yml" template file instead.
 buildvariants:
   # Test MongoDB >= 7.0
+  - name: test-debian12-php-8.5-local
+    tags: ["test", "debian", "x64", "php8.5", "pr", "tag"]
+    display_name: "Test: Debian 12, PHP 8.5"
+    run_on: debian12-small
+    expansions:
+      FETCH_BUILD_VARIANT: "build-debian12"
+      FETCH_BUILD_TASK: "build-php-8.5"
+      PHP_VERSION: "8.5"
+      VARIANT: debian12
+    depends_on:
+      - variant: "build-debian12"
+        name: "build-php-8.5"
+    tasks:
+      - ".standalone .local !.csfle !.4.2 !.4.4 !.5.0 !.6.0"
+      - ".replicaset .local !.csfle !.4.2 !.4.4 !.5.0 !.6.0"
+      - ".sharded .local !.csfle !.4.2 !.4.4 !.5.0 !.6.0"
+      - ".loadbalanced .local !.csfle !.4.2 !.4.4 !.5.0 !.6.0"
+
+  # Test MongoDB 5.0 and 6.0
+  - name: test-debian11-php-8.5-local
+    tags: ["test", "debian", "x64", "php8.5", "pr", "tag"]
+    display_name: "Test: Debian 11, PHP 8.5"
+    run_on: debian11-small
+    expansions:
+      FETCH_BUILD_VARIANT: "build-debian11"
+      FETCH_BUILD_TASK: "build-php-8.5"
+      PHP_VERSION: "8.5"
+    depends_on:
+      - variant: "build-debian11"
+        name: "build-php-8.5"
+    tasks:
+      # Remember to add new major versions here as they are released
+      - ".standalone .local !.csfle !.4.2 !.4.4 !.7.0 !.8.0 !.rapid !.latest"
+      - ".replicaset .local !.csfle !.4.2 !.4.4 !.7.0 !.8.0 !.rapid !.latest"
+      - ".sharded .local !.csfle !.4.2 !.4.4 !.7.0 !.8.0 !.rapid !.latest"
+      - ".loadbalanced .local !.csfle !.4.2 !.4.4 !.7.0 !.8.0 !.rapid !.latest"
+
+  # Test versions < 5.0
+  - name: test-rhel80-php-8.5
+    tags: ["test", "debian", "x64", "php8.5", "pr", "tag"]
+    display_name: "Test: RHEL 8.0, PHP 8.5"
+    run_on: rhel80-small
+    expansions:
+      FETCH_BUILD_VARIANT: "build-rhel80"
+      FETCH_BUILD_TASK: "build-php-8.5"
+      PHP_VERSION: "8.5"
+    depends_on:
+      - variant: "build-rhel80"
+        name: "build-php-8.5"
+    tasks:
+      # Remember to add new major versions here as they are released
+      - ".standalone .local !.csfle !.6.0 !.7.0 !.8.0 !.rapid !.latest"
+      - ".replicaset .local !.csfle !.6.0 !.7.0 !.8.0 !.rapid !.latest"
+      - ".sharded .local !.csfle !.6.0 !.7.0 !.8.0 !.rapid !.latest"
+      - ".loadbalanced .local !.csfle !.6.0 !.7.0 !.8.0 !.rapid !.latest"
+      - "test_atlas_task_group"
+      - ".csfle"
+  # Test MongoDB >= 7.0
   - name: test-debian12-php-8.4-local
     tags: ["test", "debian", "x64", "php8.4", "pr", "tag"]
     display_name: "Test: Debian 12, PHP 8.4"
diff --git a/.evergreen/config/generated/test-variant/phpc.yml b/.evergreen/config/generated/test-variant/phpc.yml
index faa3465f9..e47d40d18 100644
--- a/.evergreen/config/generated/test-variant/phpc.yml
+++ b/.evergreen/config/generated/test-variant/phpc.yml
@@ -1,34 +1,34 @@
 # This file is generated automatically - please edit the "templates/test-variant/phpc.yml" template file instead.
 buildvariants:
   # Variants with different PHPC versions
-  - name: test-debian12-php-8.4-phpc-next-stable
-    tags: ["test", "debian", "x64", "php8.4", "pr", "tag"]
-    display_name: "Test: Debian 12, PHP 8.4, PHPC next-stable"
+  - name: test-debian12-php-8.5-phpc-next-stable
+    tags: ["test", "debian", "x64", "php8.5", "pr", "tag"]
+    display_name: "Test: Debian 12, PHP 8.5, PHPC next-stable"
     run_on: debian12-small
     expansions:
       FETCH_BUILD_VARIANT: "build-debian12"
-      FETCH_BUILD_TASK: "build-php-8.4-next-stable"
-      PHP_VERSION: "8.4"
+      FETCH_BUILD_TASK: "build-php-8.5-next-stable"
+      PHP_VERSION: "8.5"
     depends_on:
       - variant: "build-debian12"
-        name: "build-php-8.4-next-stable"
+        name: "build-php-8.5-next-stable"
     tasks:
       - ".standalone .local !.csfle !.4.2 !.4.4 !.5.0 !.6.0"
       - ".replicaset .local !.csfle !.4.2 !.4.4 !.5.0 !.6.0"
       - ".sharded .local !.csfle !.4.2 !.4.4 !.5.0 !.6.0"
       - ".loadbalanced .local !.csfle !.4.2 !.4.4 !.5.0 !.6.0"
 
-  - name: test-debian12-php-8.4-phpc-next-minor
-    tags: ["test", "debian", "x64", "php8.4"]
-    display_name: "Test: Debian 12, PHP 8.4, PHPC next-minor"
+  - name: test-debian12-php-8.5-phpc-next-minor
+    tags: ["test", "debian", "x64", "php8.5"]
+    display_name: "Test: Debian 12, PHP 8.5, PHPC next-minor"
     run_on: debian12-small
     expansions:
       FETCH_BUILD_VARIANT: "build-debian12"
-      FETCH_BUILD_TASK: "build-php-8.4-next-minor"
-      PHP_VERSION: "8.4"
+      FETCH_BUILD_TASK: "build-php-8.5-next-minor"
+      PHP_VERSION: "8.5"
     depends_on:
       - variant: "build-debian12"
-        name: "build-php-8.4-next-minor"
+        name: "build-php-8.5-next-minor"
     tasks:
       - ".standalone .local !.csfle !.4.2 !.4.4 !.5.0 !.6.0"
       - ".replicaset .local !.csfle !.4.2 !.4.4 !.5.0 !.6.0"