diff --git a/.github/actions/setup-php/action.yaml b/.github/actions/setup-php/action.yaml
new file mode 100644
index 0000000..bc6efc7
--- /dev/null
+++ b/.github/actions/setup-php/action.yaml
@@ -0,0 +1,26 @@
+name: Setup PHP
+
+inputs:
+  php-version:
+    description: 'PHP version to setup'
+    required: false
+    default: '8.4'
+  extensions:
+    description: 'Comma-separated list of PHP extensions to install'
+    required: false
+    default: 'mbstring, json, bcmath, zip, pdo, pdo_mysql, pdo_pgsql, pdo_sqlite, exif, gd, ldap, fileinfo'
+  tools:
+    description: 'Comma-separated list of tools to install'
+    required: false
+    default: composer:2.8.12, phan:5.5.1
+
+runs:
+  using: "composite"
+  steps:
+    - name: Setup PHP
+      uses: shivammathur/setup-php@bf6b4fbd49ca58e4608c9c89fba0b8d90bd2a39f # v2.35.5
+      with:
+        php-version: ${{ inputs.php-version }}
+        coverage: none
+        extensions: ${{ inputs.extensions }}
+        tools: ${{ inputs.tools }}
diff --git a/.github/workflows/phan.yml b/.github/workflows/phan.yml
index a300787..67bb3cc 100644
--- a/.github/workflows/phan.yml
+++ b/.github/workflows/phan.yml
@@ -15,11 +15,7 @@ jobs:
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       - name: Setup PHP
-        uses: shivammathur/setup-php@ec406be512d7077f68eed36e63f4d91bc006edc4 # v2.35.4
-        with:
-          php-version: '8.4'
-          tools: phan:5.5.1
-          coverage: none
+        uses: ./.github/actions/setup-php
 
       - name: Restore cached baseline for Phan
         id: cache-baseline-restore
diff --git a/.github/workflows/php.yml b/.github/workflows/php.yml
index a3726fd..04f1a5c 100644
--- a/.github/workflows/php.yml
+++ b/.github/workflows/php.yml
@@ -14,8 +14,6 @@ jobs:
   test:
     name: Test
     runs-on: ${{ matrix.os }}
-    env:
-      PHP_EXTENSIONS: mbstring, json, bcmath, zip, pdo, pdo_mysql, pdo_pgsql, pdo_sqlite, exif, gd, ldap, fileinfo
     strategy:
       matrix:
         # https://github.com/shivammathur/setup-php?tab=readme-ov-file#cloud-osplatform-support
@@ -25,12 +23,10 @@ jobs:
       - name: Checkout
         uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
-      - name: Install PHP with extensions
-        uses: shivammathur/setup-php@ec406be512d7077f68eed36e63f4d91bc006edc4 # v2.35.4
+      - name: Setup PHP
+        uses: ./.github/actions/setup-php
         with:
           php-version: ${{ matrix.php-version }}
-          coverage: none
-          extensions: ${{ env.PHP_EXTENSIONS }}
 
       - name: Prepare environment
         run: composer update
diff --git a/.github/workflows/phpstan.yml b/.github/workflows/phpstan.yml
index 9ae984e..81ac969 100644
--- a/.github/workflows/phpstan.yml
+++ b/.github/workflows/phpstan.yml
@@ -20,9 +20,7 @@ jobs:
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       - name: Setup PHP
-        uses: shivammathur/setup-php@ec406be512d7077f68eed36e63f4d91bc006edc4 # v2.35.4
-        with:
-          php-version: '8.4'
+        uses: ./.github/actions/setup-php
 
       - name: Install PHPStan
         run: composer install
diff --git a/.github/workflows/save-baseline.yml b/.github/workflows/save-baseline.yml
index 0d4c3b8..ed164c3 100644
--- a/.github/workflows/save-baseline.yml
+++ b/.github/workflows/save-baseline.yml
@@ -16,11 +16,7 @@ jobs:
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       - name: Setup PHP
-        uses: shivammathur/setup-php@ec406be512d7077f68eed36e63f4d91bc006edc4 # v2.35.4
-        with:
-          php-version: '8.4'
-          tools: phan
-          coverage: none
+        uses: ./.github/actions/setup-php
 
       - name: Install PHPStan
         run: composer install