diff --git a/runs/install_packages.sh b/runs/install_packages.sh
index f16ed31182..73f5ecb4d6 100755
--- a/runs/install_packages.sh
+++ b/runs/install_packages.sh
@@ -23,3 +23,64 @@ sudo apt-get -q -y install \
 	xserver-xorg x11-xserver-utils openbox-lxde-session lightdm lightdm-autologin-greeter accountsservice \
 	chromium chromium-l10n
 echo "done"
+
+# Apply the PHP 7.4 package fix for php2shell on supported Debian 11 platforms.
+. /etc/os-release
+php74_fix_url=""
+if [ "${VERSION_ID:-}" = "11" ] && [ "$(dpkg --print-architecture)" = "armhf" ] && [ "${ID:-}" = "raspbian" ]; then
+	php74_fix_url="https://openwb.de/update/openwb-php74-fix-r2-raspbian11-armhf.tar.xz"
+elif [ "${VERSION_ID:-}" = "11" ] && [ "$(dpkg --print-architecture)" = "amd64" ] && [ "${ID:-}" = "debian" ]; then
+	php74_fix_url="https://openwb.de/update/openwb-php74-fix-r2-debian11-amd64.tar.xz"
+fi
+
+php74_fix_needed=$(dpkg-query -W -f='${db:Status-Status} ${Version}\n' \
+	php7.4-cli php7.4-common libapache2-mod-php7.4 2>/dev/null |
+	awk '$1 == "installed" && index($2, "+owphp2shell1") == 0 { needed = 1 } END { print needed + 0 }')
+
+if [ -n "$php74_fix_url" ] && [ "$php74_fix_needed" -eq 1 ]; then
+	(
+		set -e
+		workdir=$(mktemp -d "$HOME/php-fix-r2.XXXXXX")
+		apache_stopped=0
+		restart_apache() {
+			if [ "$apache_stopped" -eq 1 ]; then
+				sudo systemctl start apache2 || true
+			fi
+		}
+		cleanup() {
+			restart_apache
+			rm -rf "$workdir"
+		}
+		trap cleanup EXIT
+
+		echo "Applying PHP 7.4 package fix..."
+		curl -fL -o "$workdir/php74-fix.tar.xz" "$php74_fix_url"
+		tar -xf "$workdir/php74-fix.tar.xz" -C "$workdir"
+		package_dir=$(find "$workdir" -mindepth 1 -maxdepth 2 -type f -name SHA256SUMS -printf '%h\n' -quit)
+		if [ -z "$package_dir" ] || [ ! -d "$package_dir/pakete" ]; then
+			echo "PHP 7.4 package archive has an unexpected structure." >&2
+			exit 1
+		fi
+		cd "$package_dir"
+		sha256sum -c SHA256SUMS
+		sudo apt-get --simulate --no-remove install -y ./pakete/*.deb
+		apache_stopped=1
+		sudo systemctl stop apache2
+		sudo apt-get --no-remove install -y ./pakete/*.deb
+		sudo apache2ctl configtest
+		sudo systemctl start apache2
+		apache_stopped=0
+		dpkg-query -W php7.4-cli php7.4-common libapache2-mod-php7.4
+		status=$(sudo systemctl is-active "apache2" || true)
+		printf 'apache2: %s\n' "$status"
+	)
+	php74_fix_status=$?
+	if [ "$php74_fix_status" -ne 0 ]; then
+		echo "PHP 7.4 package fix failed." >&2
+		exit "$php74_fix_status"
+	fi
+elif [ -n "$php74_fix_url" ] && [ "$php74_fix_needed" -eq 0 ]; then
+	echo "PHP 7.4 package fix for php2shell is already applied."
+elif [ -z "$php74_fix_url" ]; then
+	echo "PHP 7.4 package fix for php2shell is not supported on this platform."
+fi
diff --git a/web/maintenance/systeminfo.html b/web/maintenance/systeminfo.html
index 77ddd1f258..bfd711b8a3 100644
--- a/web/maintenance/systeminfo.html
+++ b/web/maintenance/systeminfo.html
@@ -1,4 +1,4 @@
-<!DOCTYPE html>
+<!doctype html>
 <html lang="de">
 	<head>
 		<meta charset="UTF-8" />
@@ -101,12 +101,16 @@ <h2 id="details-modal-header">Details</h2>
 							for (const subKey in value) {
 								if (Object.hasOwn(value, subKey)) {
 									const v = value[subKey];
-									html += `<tr><th>${subKey}`;
+									const label =
+										key === "softwareInfo" && subKey === "php_version"
+											? "PHP-Version"
+											: subKey;
+									html += `<tr><th>${label}`;
 									// Falls "details" vorhanden, einen runden Info-Button anzeigen
 									if (v && typeof v === "object" && "details" in v) {
 										const infoBtnId = `info_${key}_${subKey}`.replace(
 											/\W/g,
-											"_"
+											"_",
 										);
 										html += ` <button class="details-button" data-details="${v.details}">i</button>`;
 									}
@@ -171,7 +175,7 @@ <h2 id="details-modal-header">Details</h2>
 										}, 2000);
 										alert(
 											"Fehler beim Neustart: " +
-												(result.message || result.output || "")
+												(result.message || result.output || ""),
 										);
 									}
 								} catch (err) {
@@ -291,7 +295,7 @@ <h2>${key}</h2>
 						const data = value.map((e) =>
 							typeof e.v === "object" && e.v !== null && "value" in e.v
 								? Number(e.v.value)
-								: Number(e.v)
+								: Number(e.v),
 						);
 						// Einheit für Achsenlabel holen
 						let unit = "";
@@ -347,7 +351,7 @@ <h2>${key}</h2>
 							const data = arr.map((e) =>
 								typeof e.v === "object" && e.v !== null && "value" in e.v
 									? Number(e.v.value)
-									: Number(e.v)
+									: Number(e.v),
 							);
 							const chartKey = `${key}_${subKey}`;
 							// Einheit für Achsenlabel holen
diff --git a/web/maintenance/systeminfo_api.php b/web/maintenance/systeminfo_api.php
index 5c1183bb97..2afca31be8 100644
--- a/web/maintenance/systeminfo_api.php
+++ b/web/maintenance/systeminfo_api.php
@@ -154,6 +154,16 @@ function getSoftwareInfo()
 	$version = 'unbekannt';
 	// $branch = 'unbekannt';
 	$commit = 'unbekannt';
+	$phpVersion = 'unbekannt';
+	$phpPackage = 'php' . PHP_MAJOR_VERSION . '.' . PHP_MINOR_VERSION . '-cli';
+	$phpPackageInfo = trim((string)@shell_exec(
+		"dpkg-query -W -f='\${db:Status-Status}|\${Version}' " .
+		escapeshellarg($phpPackage) .
+		" 2>/dev/null"
+	));
+	if (strpos($phpPackageInfo, 'installed|') === 0) {
+		$phpVersion = substr($phpPackageInfo, strlen('installed|'));
+	}
 
 	// Git-Verzeichnis bestimmen (eine Ebene höher als "web")
 	$repoDir = dirname(__DIR__, 2);
@@ -189,6 +199,10 @@ function getSoftwareInfo()
 		'git_commit' => [
 			'value' => $commit,
 			'unit' => ''
+		],
+		'php_version' => [
+			'value' => $phpVersion,
+			'unit' => ''
 		]
 	];
 }