diff --git a/.github/actions/deploy/create-version.sh b/.github/actions/deploy/create-version.sh
deleted file mode 100755
index 1ee86d528..000000000
--- a/.github/actions/deploy/create-version.sh
+++ /dev/null
@@ -1,85 +0,0 @@
-#! /bin/bash -e
-
-# set -x
-
-if [ $# -lt 1 ]; then
-        echo "Please provide the name of a file to read the commit message from"
-        exit 1
-fi
-
-deploy_path='.github/actions/deploy'
-
-stable_branch=$(cat "$deploy_path/stable_name")
-master_branch=master
-
-major=$(cat "$deploy_path/major")
-minor=$(cat "$deploy_path/minor")
-patch=$(cat "$deploy_path/patch")
-
-# release
-message="$(cat "$1")"
-
-parse_pre_release () {
-        echo "$1" | grep -E '%PRE-?RELEASE%' | head -n 1 | sed -E 's@.*%PRE-?RELEASE%([^%]+)%.*@\1@'
-}
-
-if echo "$message" | grep '%MAJOR%' > /dev/null ; then
-        
-        echo 'Creating major version'
-        let major=major+1
-        minor=0
-        patch=0
-        
-elif echo "$message" | grep '%MINOR%' > /dev/null; then
-        
-        echo 'Creating minor version'
-        let minor=minor+1
-        patch=0
-        
-else
-        
-        echo 'Creating patch version'
-        let patch=patch+1
-        
-fi
-
-prerelease="$(parse_pre_release "$message")"
-version="$major.$minor.$patch"
-
-if [ -n "$prerelease" ]; then
-        # We want to build a pre-release
-        echo "Not Updating the version files as we are creating a pre-release."
-        version="$version-$prerelease"
-else
-        echo "Updating bumped version files"
-        echo $major > "$deploy_path/major"
-        echo $minor > "$deploy_path/minor"
-        echo $patch > "$deploy_path/patch"
-fi
-
-echo "The new version is $version."
-
-echo "Storing new release version in $deploy_path/last_release"
-echo "$version" > "$deploy_path/last_release"
-
-"$deploy_path/update-data.sh" "$version" "$major" "$minor" "$patch" "$prerelease"
-
-git add "$deploy_path/major" "$deploy_path/minor" "$deploy_path/patch" "$deploy_path/last_release"
-
-# exit
-
-git config user.name 'Github actions bot'
-git config user.email 'bot@noreply.github.com'
-
-git commit -s -m "Bump to version $version"
-git tag "v$version"
-
-git checkout $master_branch
-git merge --no-ff $stable_branch
-
-git remote add tokenized "https://nextcloud-cookbook-bot:$BOT_TOKEN@github.com/nextcloud/cookbook.git"
-
-git -c "http.https://github.com/.extraheader=" push tokenized $stable_branch $master_branch
-git push origin "v$version"
-
-echo "version=$version" >> $GITHUB_OUTPUT
diff --git a/.github/actions/php-linter/Dockerfile b/.github/actions/php-linter/Dockerfile
new file mode 100644
index 000000000..e920ff9c7
--- /dev/null
+++ b/.github/actions/php-linter/Dockerfile
@@ -0,0 +1,5 @@
+FROM php:7.4
+
+COPY tester.sh /tester.sh
+
+CMD ["/tester.sh", "/work"]
diff --git a/.github/actions/php-linter/tester.sh b/.github/actions/php-linter/tester.sh
new file mode 100755
index 000000000..4ae0685e4
--- /dev/null
+++ b/.github/actions/php-linter/tester.sh
@@ -0,0 +1,25 @@
+#!/bin/bash
+
+cd "$1"
+
+ret=0
+
+while IFS= read -d '' file
+do
+	php -l "$file" > /tmp/msg
+	retSingle=$?
+
+	if [ $retSingle -eq 0 ]
+	then
+		cat /tmp/msg | sed 's@^@::debug::@'
+	else
+		ret=1
+		msg="$(cat /tmp/msg)"
+		echo "$msg" | sed 's@^\s*$@@' | grep -v '^$' > /tmp/msg
+		line=$(cat /tmp/msg | grep -o ' on line [0-9]*' | sed -E 's@ on line ([0-9]*)$@\1@')
+		prefix="::error file=$file,line=$line,title=PHP linter failed::"
+		sed "s@^@$prefix@" /tmp/msg 
+	fi
+done < <(find lib -type f -name '*.php' -print0)
+
+exit $ret
diff --git a/.github/workflows/pages.yml b/.github/workflows/pages.yml
index b2b794664..b35188a19 100644
--- a/.github/workflows/pages.yml
+++ b/.github/workflows/pages.yml
@@ -67,7 +67,7 @@ jobs:
       name: github-pages
       url: ${{ steps.deployment.outputs.page_url }}
     runs-on: ubuntu-22.04
-    if: github.event.ref == 'refs/heads/master'
+    if: github.event.ref == 'refs/heads/master' && github.repository == 'nextcloud/cookbook'
     needs: build
     steps:
       - name: Deploy to GitHub Pages
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 3455a8c77..fc42f49c0 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -370,9 +370,6 @@ jobs:
     
   source-package:
     name: Create source code artifacts
-    needs:
-        - unit-tests
-        - code-lint
     runs-on: ubuntu-22.04
     
     steps:
@@ -443,4 +440,30 @@ jobs:
         path: ${{ github.event_path }}
         retention-days: 1
 
+  lint-php:
+    name: "Lint PHP files to be compatible"
+    runs-on: ubuntu-22.04
+    defaults:
+      run:
+        shell: bash
+    steps:
+    - name: Checkout of the app
+      uses: actions/checkout@v4
+    - name: build docker container image
+      run: docker build -t php-lint-tester .github/actions/php-linter
+    - name: Check the code base
+      run: docker run --rm -v $(pwd):/work:ro php-lint-tester
 
+  successful_run:
+    name: The tests have successfully run
+    runs-on: ubuntu-22.04
+    needs:
+      - unit-tests
+      - code-lint
+      - source-package
+      - lint-php
+      - event_file
+    steps:
+      - name: Run successfully
+        shell: bash
+        run: echo "The tests have been running successfully"
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2ccddce55..60857645f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 ## [Unreleased]
 
+### Maintenance
+- Add PHP lint checker to ensure valid (legacy) PHP syntax
+  [#1931](https://github.com/nextcloud/cookbook/pull/1931) @christianlupus
+
 
 ## 0.10.3 - 2023-12-04
 
diff --git a/lib/Helper/Filter/JSON/AbstractJSONFilter.php b/lib/Helper/Filter/JSON/AbstractJSONFilter.php
index 0ffaea89a..352983a7e 100644
--- a/lib/Helper/Filter/JSON/AbstractJSONFilter.php
+++ b/lib/Helper/Filter/JSON/AbstractJSONFilter.php
@@ -26,7 +26,7 @@ abstract public function apply(array &$json): bool;
 	/**
 	 * @param string|int|float|array $value
 	 */
-	protected function setJSONValue(array &$json, string $key, string|int|float|array $value): bool {
+	protected function setJSONValue(array &$json, string $key, $value): bool {
 		if (!array_key_exists($key, $json)) {
 			$json[$key] = $value;
 			return true;
diff --git a/lib/Helper/Filter/Output/RecipeStubFilter.php b/lib/Helper/Filter/Output/RecipeStubFilter.php
index a02df79a2..8e38efcf9 100644
--- a/lib/Helper/Filter/Output/RecipeStubFilter.php
+++ b/lib/Helper/Filter/Output/RecipeStubFilter.php
@@ -12,7 +12,7 @@ class RecipeStubFilter {
 
 	public function __construct(
 		RecipeIdTypeFilter $recipeIdTypeFilter,
-		RecipeIdCopyFilter $recipeIdCopyFilter,
+		RecipeIdCopyFilter $recipeIdCopyFilter
 	) {
 		$this->filters = [
 			$recipeIdCopyFilter,
diff --git a/lib/Helper/TimestampHelper.php b/lib/Helper/TimestampHelper.php
index 4f19a2287..a9836a3f8 100644
--- a/lib/Helper/TimestampHelper.php
+++ b/lib/Helper/TimestampHelper.php
@@ -45,7 +45,7 @@ public function parseTimestamp(string $timestamp): string {
 		// For now, we only support the ISO8601 format because it is required in the schema.org standard
 		try {
 			return $this->parseIsoFormat($timestamp);
-		} catch (InvalidTimestampException) {
+		} catch (InvalidTimestampException $ex) {
 			// We do nothing here. Check the next format
 		}
 
@@ -65,15 +65,15 @@ public function parseTimestamp(string $timestamp): string {
 	private function parseIsoFormat(string $timestamp): string {
 		try {
 			return $this->parseIsoCalendarDateFormat($timestamp, '-');
-		} catch (InvalidTimestampException) { // Check next format
+		} catch (InvalidTimestampException $ex) { // Check next format
 		}
 		try {
 			return $this->parseIsoCalendarDateFormat($timestamp, '');
-		} catch (InvalidTimestampException) { // Check next format
+		} catch (InvalidTimestampException $ex) { // Check next format
 		}
 		try {
 			return $this->parseIsoWeekDateFormat($timestamp, '-');
-		} catch (InvalidTimestampException) { // Check next format
+		} catch (InvalidTimestampException $ex) { // Check next format
 		}
 
 		return $this->parseIsoWeekDateFormat($timestamp, '');