diff --git a/.git-hooks-matomo/pre-push b/.git-hooks-matomo/pre-push
new file mode 100755
index 0000000..61d26af
--- /dev/null
+++ b/.git-hooks-matomo/pre-push
@@ -0,0 +1,107 @@
+#!/bin/bash
+
+# This hook is called with the following parameters:
+#
+# $1 -- Name of the remote to which the push is being done
+# $2 -- URL to which the push is being done
+#
+# If pushing without using a named remote those arguments will be equal.
+#
+# Information about the commits which are being pushed is supplied as lines to
+# the standard input in the form:
+#
+#   <local ref> <local oid> <remote ref> <remote oid>
+
+
+
+### Check we're running in the context of a plugin and get helpful dir variables ###
+
+REPO_DIR="$(git rev-parse --show-toplevel)"
+echo "Running pre-commit hook in repo: $REPO_DIR"
+
+if [[ "$REPO_DIR" =~ /plugins/(.*) ]]; then
+    PLUGIN_PATH="plugins/${BASH_REMATCH[1]}/"
+else
+    echo "Not a plugin, not running any further checks"
+    exit 1
+fi
+MATOMO_DIR=$(echo "$REPO_DIR" | sed -E 's|/plugins/.*$||')
+
+
+
+### Figure out how to run PHPStan - ddev or not. ###
+
+COMMAND=""
+# Use local PHP if setup
+if command -v php >/dev/null 2>&1; then
+    if [ -f "${MATOMO_DIR}/vendor/bin/phpstan" ]; then
+      COMMAND="${MATOMO_DIR}/vendor/bin/phpstan"
+      PLUGIN_PATH=''
+    fi
+fi
+# Use ddev if setup (overridding local setup)
+if command -v ddev >/dev/null 2>&1; then
+  if [ -d "$MATOMO_DIR/.ddev" ]; then
+    cd "$MATOMO_DIR" || exit 1
+    if ddev status 2>&1 > /dev/null; then
+      COMMAND="ddev exec phpstan"
+    fi
+  fi
+fi
+# If no command, exit
+if [[ -z "$COMMAND" ]]; then
+  echo "No way to run phpstan found."
+  exit 1
+fi
+
+
+
+# Basic setup
+cd "$REPO_DIR"
+STATUS=0
+
+
+
+
+### Run PHPStan on newly created files. ###
+
+PHPSTAN_CREATED_CONFIG=phpstan/phpstan.created.neon
+MAIN_BRANCH='5.x-dev'
+if [[ -f "$PHPSTAN_CREATED_CONFIG" ]]; then
+  CHANGED_FILES=$(git diff --name-only ${MAIN_BRANCH} --diff-filter=A | grep '\.php$' || true)
+  if [ -z "$CHANGED_FILES" ]; then
+    echo "No created PHP files"
+  else
+    echo "Running PHPstan at a very high level on new files"
+    CHANGED_FILES=`echo "$CHANGED_FILES" | sed -e 's/^\(.*\)$/"\1"/' | xargs -I{} echo "${PLUGIN_PATH}{}"`
+    echo "$CHANGED_FILES" | xargs $COMMAND analyse -c ${PLUGIN_PATH}${PHPSTAN_CREATED_CONFIG} || STATUS=1
+  fi
+fi
+
+
+
+### Run PHPStan on modified files. ###
+PHPSTAN_MODIFIED_CONFIG=phpstan/phpstan.modified.neon
+if [[ -f "$PHPSTAN_MODIFIED_CONFIG" ]]; then
+  CHANGED_FILES=$(git diff --name-only ${MAIN_BRANCH} --diff-filter=CM | grep '\.php$' || true)
+  if [ -z "$CHANGED_FILES" ]; then
+    echo "No changed PHP files"
+  else
+    echo "Running PHPstan on modified files"
+    CHANGED_FILES=`echo "$CHANGED_FILES" | sed -e 's/^\(.*\)$/"\1"/' | xargs -I{} echo "${PLUGIN_PATH}{}"`
+    echo "$CHANGED_FILES" | xargs $COMMAND analyse -c ${PLUGIN_PATH}${PHPSTAN_MODIFIED_CONFIG} || STATUS=1
+  fi
+fi
+
+# Don't bother running the full check, as we check changes files already, and
+# can assume that the unchanged files don't need rechecking.
+#
+# Github will check this anyway.
+#
+# PHPSTAN_BASE_CONFIG=phpstan.neon
+# if [[ -f "$PHPSTAN_BASE_CONFIG" ]]; then
+#     echo "Running PHPstan at a base level on all plugin files"
+#   $COMMAND analyse -c ${PLUGIN_PATH}/${PHPSTAN_BASE_CONFIG} || STATUS=1
+# fi
+
+exit $STATUS
diff --git a/.github/workflows/phpstan.yml b/.github/workflows/phpstan.yml
new file mode 100644
index 0000000..acb9bf9
--- /dev/null
+++ b/.github/workflows/phpstan.yml
@@ -0,0 +1,83 @@
+name: PHPStan check
+
+on: pull_request
+
+permissions:
+  actions: read
+  checks: read
+  contents: read
+  deployments: none
+  issues: read
+  packages: none
+  pull-requests: read
+  repository-projects: none
+  security-events: none
+  statuses: read
+
+env:
+  PLUGIN_NAME: Slack
+
+jobs:
+  phpstan:
+    name: PHPStan
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          lfs: false
+          persist-credentials: false
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: '7.2'
+
+      - name: Check out github-action-tests repository
+        uses: actions/checkout@v4
+        with:
+          repository: matomo-org/github-action-tests
+          ref: main
+          path: github-action-tests
+
+      - name: checkout matomo for plugin builds
+        shell: bash
+        run: ${{ github.workspace }}/github-action-tests/scripts/bash/checkout_matomo.sh
+        env:
+          PLUGIN_NAME: ${{ env.PLUGIN_NAME }}
+          WORKSPACE: ${{ github.workspace }}
+          ACTION_PATH: ${{ github.workspace }}/github-action-tests
+          MATOMO_TEST_TARGET: maximum_supported_matomo
+
+      - name: prepare setup
+        shell: bash
+        run: |
+          cd ${{ github.workspace }}/matomo
+          echo -e "composer install"
+          composer install --ignore-platform-reqs
+
+      - name: checkout additional plugins
+        if: ${{ env.DEPENDENT_PLUGINS != '' }}
+        shell: bash
+        working-directory: ${{ github.workspace }}/matomo
+        run: ${{ github.workspace }}/github-action-tests/scripts/bash/checkout_dependent_plugins.sh
+
+        env:
+          GITHUB_USER_TOKEN: ${{ secrets.TESTS_ACCESS_TOKEN || secrets.GITHUB_TOKEN }}
+
+      - name: "Restore result cache"
+        uses: actions/cache/restore@v4
+        with:
+          path: /tmp/phpstan # same as in phpstan.neon
+          key: "phpstan-result-cache-${{ github.run_id }}"
+          restore-keys: |
+            phpstan-result-cache-
+
+      - name: PHPStan whole repo
+        id: phpstan-all
+        run: cd ${{ github.workspace }}/matomo && composer run phpstan -- -vvv -c plugins/${{ env.PLUGIN_NAME }}/phpstan.neon
+
+      - name: "Save result cache"
+        uses: actions/cache/save@v4
+        if: ${{ !cancelled() }}
+        with:
+          path: /tmp/phpstan # same as in phpstan.neon
+          key: "phpstan-result-cache-${{ github.run_id }}"
\ No newline at end of file
diff --git a/ScheduleReportSlack.php b/ScheduleReportSlack.php
index 594cdb5..d0a5aff 100644
--- a/ScheduleReportSlack.php
+++ b/ScheduleReportSlack.php
@@ -37,10 +37,6 @@ class ScheduleReportSlack
      */
     private $token;
 
-    /**
-     * @var string
-     */
-
     public function __construct(
         string $subject,
         string $fileName,
diff --git a/phpstan.neon b/phpstan.neon
new file mode 100644
index 0000000..fbc5b99
--- /dev/null
+++ b/phpstan.neon
@@ -0,0 +1,21 @@
+parameters:
+    level: 5
+    phpVersion: 70200
+    tmpDir: /tmp/phpstan/Slack/main
+    paths:
+        - .
+    excludePaths:
+        - tests/*
+        - github-action-tests
+    bootstrapFiles:
+        - ../../bootstrap-phpstan.php
+    universalObjectCratesClasses:
+        - Piwik\Config
+        - Piwik\View
+        - Piwik\ViewDataTable\Config
+    scanDirectories:
+        # ../../ does not actually seem to give us anything
+        # that ../plugins/ does not, but including it for
+        # completeness.  It does not seem to slow down performance.
+        - .
+
diff --git a/phpstan/phpstan.created.neon b/phpstan/phpstan.created.neon
new file mode 100644
index 0000000..ee4a72a
--- /dev/null
+++ b/phpstan/phpstan.created.neon
@@ -0,0 +1,5 @@
+includes:
+    - ../phpstan.neon
+parameters:
+    level: 5
+    tmpDir: /tmp/phpstan/Slack/created
\ No newline at end of file
diff --git a/phpstan/phpstan.modified.neon b/phpstan/phpstan.modified.neon
new file mode 100644
index 0000000..981c06f
--- /dev/null
+++ b/phpstan/phpstan.modified.neon
@@ -0,0 +1,5 @@
+includes:
+    - ../phpstan.neon
+parameters:
+    level: 5
+    tmpDir: /tmp/phpstan/Slack/modified
\ No newline at end of file