diff --git a/.github/workflows/php85.yml b/.github/workflows/php85.yml
new file mode 100755
index 0000000..58f0dc4
--- /dev/null
+++ b/.github/workflows/php85.yml
@@ -0,0 +1,87 @@
+name: PHP Composer install tests - PHP 8.5
+
+on:
+  push:
+    branches: [ "FRAMEWORK_6_0" ]
+  pull_request:
+    branches: [ "FRAMEWORK_6_0" ]
+  schedule:
+    - cron: "0 0 */2 * *"
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Install PHP 8.5 with all Horde extensions
+      run: sudo bash scripts/install-ubuntu-24.04.sh
+
+    - name: Set PHP 8.5 as default
+      run: |
+        sudo update-alternatives --set php /usr/bin/php8.5
+        which php
+        php --version
+
+    - name: Validate composer.json and composer.lock
+      run: composer validate --strict
+
+    - name: Cache Composer packages
+      id: composer-cache
+      uses: actions/cache@v3
+      with:
+        path: vendor
+        key: ${{ runner.os }}-php85-${{ hashFiles('**/composer.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-php85-
+
+    - name: Install dependencies for composer.json as-is
+      run: composer install --prefer-dist --no-progress
+
+    - name: Install passwd app
+      run: composer require horde/passwd --prefer-dist --no-progress
+
+    - name: Install content tagger app
+      run: composer require horde/content --prefer-dist --no-progress
+
+    - name: Install timeobjects app
+      run: composer require horde/timeobjects --prefer-dist --no-progress
+
+    - name: Install mnemo notes app
+      run: composer require horde/mnemo --prefer-dist --no-progress
+
+    - name: Install ingo mail filter app
+      run: composer require horde/ingo --prefer-dist --no-progress
+
+    - name: Install turba addressbook app
+      run: composer require horde/turba --prefer-dist --no-progress
+
+    - name: Install kronolith calendar app
+      run: composer require horde/kronolith --prefer-dist --no-progress
+
+    - name: Install whups ticketing app
+      run: composer require horde/whups --prefer-dist --no-progress
+
+    - name: Install trean bookmarks app
+      run: composer require horde/trean --prefer-dist --no-progress
+
+    - name: Install chora version control system viewer
+      run: composer require horde/chora --prefer-dist --no-progress
+
+    - name: Install jonah rss feed app
+      run: composer require horde/jonah --prefer-dist --no-progress
+
+    - name: Install gollem file manager
+      run: composer require horde/gollem --prefer-dist --no-progress
+
+    # Add a test script to composer.json, for instance: "test": "vendor/bin/phpunit"
+    # Docs: https://getcomposer.org/doc/articles/scripts.md
+
+    # - name: Run test suite
+    #   run: composer run-script test
diff --git a/scripts/horde-dev-server.sh b/scripts/horde-dev-server.sh
new file mode 100755
index 0000000..20bd2e7
--- /dev/null
+++ b/scripts/horde-dev-server.sh
@@ -0,0 +1,183 @@
+#!/bin/bash
+#
+# Horde Development Server
+#
+# Runs PHP's built-in development server for Horde
+# Default: localhost:8585 serving /srv/www/horde-dev/web
+#
+# Usage:
+#   horde-dev-server.sh                    # localhost:8585
+#   horde-dev-server.sh -p 8080            # localhost:8080
+#   horde-dev-server.sh -a                 # 0.0.0.0:8585 (all interfaces)
+#   horde-dev-server.sh -a -p 9000         # 0.0.0.0:9000
+#   horde-dev-server.sh --php 8.4          # Use PHP 8.4
+#
+
+set -e
+set -u
+
+# Color output
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+BLUE='\033[0;34m'
+NC='\033[0m' # No Color
+
+log_info() {
+    echo -e "${GREEN}[INFO]${NC} $1"
+}
+
+log_warn() {
+    echo -e "${YELLOW}[WARN]${NC} $1"
+}
+
+log_error() {
+    echo -e "${RED}[ERROR]${NC} $1"
+}
+
+# Default configuration
+DOCUMENT_ROOT="/srv/www/horde-dev/web"
+HOST="localhost"
+PORT="8585"
+PHP_VERSION=""
+
+# Parse command line arguments
+show_help() {
+    cat << EOF
+Horde Development Server
+
+Usage: $(basename "$0") [OPTIONS]
+
+Options:
+  -a, --all-interfaces    Listen on all interfaces (0.0.0.0) instead of localhost
+  -p, --port PORT         Port number (default: 8585)
+  -d, --docroot PATH      Document root directory (default: /srv/www/horde-dev/web)
+  --php VERSION           PHP version to use (e.g., 8.3, 8.4, 8.5)
+  -h, --help              Show this help message
+
+Examples:
+  $(basename "$0")                      # Start server on localhost:8585
+  $(basename "$0") -p 8080              # Start server on localhost:8080
+  $(basename "$0") -a                   # Start server on 0.0.0.0:8585
+  $(basename "$0") -a -p 9000           # Start server on 0.0.0.0:9000
+  $(basename "$0") --php 8.4            # Use PHP 8.4
+  $(basename "$0") -a -p 8080 --php 8.5 # All options combined
+
+EOF
+}
+
+while [[ $# -gt 0 ]]; do
+    case "$1" in
+        -a|--all-interfaces)
+            HOST="0.0.0.0"
+            shift
+            ;;
+        -p|--port)
+            PORT="$2"
+            shift 2
+            ;;
+        -d|--docroot)
+            DOCUMENT_ROOT="$2"
+            shift 2
+            ;;
+        --php)
+            PHP_VERSION="$2"
+            shift 2
+            ;;
+        -h|--help)
+            show_help
+            exit 0
+            ;;
+        *)
+            log_error "Unknown option: $1"
+            echo ""
+            show_help
+            exit 1
+            ;;
+    esac
+done
+
+# Validate port number
+if ! [[ "$PORT" =~ ^[0-9]+$ ]] || [ "$PORT" -lt 1 ] || [ "$PORT" -gt 65535 ]; then
+    log_error "Invalid port number: $PORT (must be between 1 and 65535)"
+    exit 1
+fi
+
+# Check if document root exists
+if [ ! -d "$DOCUMENT_ROOT" ]; then
+    log_error "Document root does not exist: $DOCUMENT_ROOT"
+    exit 1
+fi
+
+# Determine PHP binary to use
+if [ -n "$PHP_VERSION" ]; then
+    PHP_BINARY="php${PHP_VERSION}"
+    if ! command -v "$PHP_BINARY" >/dev/null 2>&1; then
+        log_error "PHP version $PHP_VERSION not found (tried: $PHP_BINARY)"
+        log_info "Available PHP versions:"
+        ls -1 /usr/bin/php[0-9]* 2>/dev/null || echo "  None found"
+        exit 1
+    fi
+else
+    PHP_BINARY="php"
+fi
+
+# Get PHP version info
+PHP_VERSION_INFO=$("$PHP_BINARY" -v | head -n 1)
+
+# Check if port is already in use
+if command -v ss >/dev/null 2>&1; then
+    if ss -tuln | grep -q ":${PORT} "; then
+        log_error "Port $PORT is already in use"
+        log_info "Active ports:"
+        ss -tuln | grep LISTEN | grep ":${PORT} " || true
+        exit 1
+    fi
+elif command -v netstat >/dev/null 2>&1; then
+    if netstat -tuln | grep -q ":${PORT} "; then
+        log_error "Port $PORT is already in use"
+        log_info "Active ports:"
+        netstat -tuln | grep LISTEN | grep ":${PORT} " || true
+        exit 1
+    fi
+fi
+
+# Display server information
+echo ""
+echo "======================================"
+echo "  Horde Development Server"
+echo "======================================"
+echo ""
+echo "  Document Root: $DOCUMENT_ROOT"
+echo "  PHP Version:   $PHP_VERSION_INFO"
+echo "  Listen Address: ${HOST}:${PORT}"
+echo ""
+
+if [ "$HOST" = "0.0.0.0" ]; then
+    log_warn "Server is listening on ALL network interfaces"
+    log_warn "This exposes Horde to your local network"
+    echo ""
+    log_info "Access URLs:"
+    echo "    http://localhost:${PORT}/"
+    # Try to get local IP addresses
+    if command -v ip >/dev/null 2>&1; then
+        LOCAL_IPS=$(ip -4 addr show | grep -oP '(?<=inet\s)\d+(\.\d+){3}' | grep -v '127.0.0.1' || true)
+        if [ -n "$LOCAL_IPS" ]; then
+            while IFS= read -r IP; do
+                echo "    http://${IP}:${PORT}/"
+            done <<< "$LOCAL_IPS"
+        fi
+    fi
+else
+    log_info "Access URL: http://localhost:${PORT}/"
+fi
+
+echo ""
+log_info "Starting PHP built-in server..."
+log_info "Press Ctrl+C to stop"
+echo ""
+echo "--------------------------------------"
+
+# Start the server
+cd "$DOCUMENT_ROOT"
+exec "$PHP_BINARY" -S "${HOST}:${PORT}" -t "$DOCUMENT_ROOT"
diff --git a/scripts/install-ubuntu-24.04-developer-tools.sh b/scripts/install-ubuntu-24.04-developer-tools.sh
new file mode 100755
index 0000000..de3dfbf
--- /dev/null
+++ b/scripts/install-ubuntu-24.04-developer-tools.sh
@@ -0,0 +1,294 @@
+#!/bin/bash
+#
+# Horde Developer Tools Setup for Ubuntu 24.04 LTS (Noble)
+#
+# This script is idempotent - safe to run multiple times
+# Installs PHP versions (via install-ubuntu-24.04.sh) and developer tools via PHIVE
+#
+# Usage: sudo bash install-ubuntu-24.04-developer-tools.sh
+#
+
+set -e  # Exit on error
+set -u  # Exit on undefined variable
+
+# Color output
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+BLUE='\033[0;34m'
+NC='\033[0m' # No Color
+
+log_info() {
+    echo -e "${GREEN}[INFO]${NC} $1"
+}
+
+log_warn() {
+    echo -e "${YELLOW}[WARN]${NC} $1"
+}
+
+log_error() {
+    echo -e "${RED}[ERROR]${NC} $1"
+}
+
+log_step() {
+    echo -e "${BLUE}[STEP]${NC} $1"
+}
+
+# Check if running as root
+if [ "$EUID" -ne 0 ]; then
+    log_error "This script must be run as root (use sudo)"
+    exit 1
+fi
+
+log_info "Starting Horde developer tools setup for Ubuntu 24.04..."
+
+# Determine script directory
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+PHP_INSTALL_SCRIPT="${SCRIPT_DIR}/install-ubuntu-24.04.sh"
+
+# Step 1: Run PHP installation script
+log_step "Step 1: Installing PHP versions and extensions"
+if [ -f "$PHP_INSTALL_SCRIPT" ]; then
+    log_info "Running PHP installation script: $PHP_INSTALL_SCRIPT"
+    bash "$PHP_INSTALL_SCRIPT"
+else
+    log_error "PHP installation script not found at: $PHP_INSTALL_SCRIPT"
+    exit 1
+fi
+
+echo ""
+log_step "Step 2: Installing PHIVE (PHar Installation and Verification Environment)"
+
+# PHIVE installation directories
+PHIVE_HOME="/usr/local/lib/phive"
+PHIVE_BIN="/usr/local/bin/phive"
+TOOLS_DIR="/usr/local/bin"
+
+# Check if PHIVE is already installed
+if command -v phive >/dev/null 2>&1; then
+    CURRENT_VERSION=$(phive --version | grep -oP 'version \K[0-9.]+' || echo "unknown")
+    log_info "PHIVE already installed (version: ${CURRENT_VERSION})"
+else
+    log_info "Installing PHIVE..."
+
+    # Install prerequisites
+    apt-get install -y -qq wget gnupg
+
+    # Download PHIVE installer
+    wget -q -O phive-installer.phar "https://phar.io/releases/phive.phar"
+    wget -q -O phive-installer.phar.asc "https://phar.io/releases/phive.phar.asc"
+
+    # Import PHIVE GPG keys
+    log_info "Importing PHIVE GPG keys..."
+    gpg --keyserver hkps://keys.openpgp.org --recv-keys 0x9D8A98B29B2D5D79 2>/dev/null || \
+    gpg --keyserver hkps://keyserver.ubuntu.com --recv-keys 0x9D8A98B29B2D5D79 2>/dev/null || \
+    log_warn "Could not import GPG key from keyserver, signature verification may fail"
+
+    # Verify signature (don't fail if verification fails)
+    if gpg --verify phive-installer.phar.asc phive-installer.phar 2>/dev/null; then
+        log_info "PHIVE signature verified successfully"
+    else
+        log_warn "Could not verify PHIVE signature, continuing anyway..."
+    fi
+
+    # Install PHIVE
+    chmod +x phive-installer.phar
+    mv phive-installer.phar "$PHIVE_BIN"
+    rm -f phive-installer.phar.asc
+
+    log_info "PHIVE installed successfully"
+fi
+
+# Verify PHIVE installation
+if ! command -v phive >/dev/null 2>&1; then
+    log_error "PHIVE installation failed"
+    exit 1
+fi
+
+PHIVE_VERSION=$(phive --version | head -n 1)
+log_info "PHIVE version: $PHIVE_VERSION"
+
+echo ""
+log_step "Step 3: Installing developer tools via PHIVE"
+
+# Configure PHIVE to install globally
+export PHIVE_HOME="$PHIVE_HOME"
+
+# Function to install tool via PHIVE
+install_phive_tool() {
+    local TOOL_NAME="$1"
+    local TOOL_ALIAS="$2"
+
+    log_info "Installing ${TOOL_NAME}..."
+
+    # Check if already installed
+    if [ -f "${TOOLS_DIR}/${TOOL_ALIAS%%@*}" ]; then
+        INSTALLED_TOOL="${TOOLS_DIR}/${TOOL_ALIAS%%@*}"
+        log_info "${TOOL_NAME} already installed at ${INSTALLED_TOOL}"
+
+        # Get version
+        if [ -x "$INSTALLED_TOOL" ]; then
+            TOOL_VERSION=$("$INSTALLED_TOOL" --version 2>/dev/null | head -n 1 || echo "unknown version")
+            log_info "Current version: ${TOOL_VERSION}"
+        fi
+    else
+        # Install fresh - accept unsigned for simplicity
+        log_info "Installing ${TOOL_ALIAS} globally..."
+        if phive install "$TOOL_ALIAS" --global --force-accept-unsigned --copy 2>&1 | tee /tmp/phive-install.log; then
+            log_info "${TOOL_NAME} installed successfully"
+        else
+            log_warn "Failed to install ${TOOL_NAME} via PHIVE"
+            return 1
+        fi
+    fi
+}
+
+# Install Composer
+log_info "Installing Composer..."
+if command -v composer >/dev/null 2>&1; then
+    COMPOSER_VERSION=$(composer --version 2>/dev/null | grep -oP 'version \K[0-9.]+' || echo "unknown")
+    log_info "Composer already installed (version: ${COMPOSER_VERSION})"
+    log_info "Updating Composer..."
+    composer self-update 2>/dev/null || log_warn "Could not update Composer"
+else
+    log_info "Downloading Composer installer..."
+    EXPECTED_CHECKSUM="$(wget -q -O - https://composer.github.io/installer.sig)"
+    php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
+    ACTUAL_CHECKSUM="$(php -r "echo hash_file('sha384', 'composer-setup.php');")"
+
+    if [ "$EXPECTED_CHECKSUM" != "$ACTUAL_CHECKSUM" ]; then
+        log_error "Composer installer checksum mismatch"
+        rm composer-setup.php
+        exit 1
+    fi
+
+    php composer-setup.php --quiet --install-dir=/usr/local/bin --filename=composer
+    rm composer-setup.php
+    log_info "Composer installed successfully"
+fi
+
+# Install PHPUnit (latest two major versions)
+log_info "Installing PHPUnit versions..."
+
+# PHPUnit 11 (latest)
+if install_phive_tool "PHPUnit 11" "phpunit@^11"; then
+    # Create phpunit11 alias
+    if [ -L "${TOOLS_DIR}/phpunit" ] && [ ! -e "${TOOLS_DIR}/phpunit11" ]; then
+        ln -sf "$(readlink ${TOOLS_DIR}/phpunit)" "${TOOLS_DIR}/phpunit11" 2>/dev/null || true
+    fi
+fi
+
+# PHPUnit 10
+if install_phive_tool "PHPUnit 10" "phpunit@^10"; then
+    # If PHPUnit 11 wasn't installed, the main phpunit might be v10
+    if [ -L "${TOOLS_DIR}/phpunit" ] && [ ! -e "${TOOLS_DIR}/phpunit10" ]; then
+        PHPUNIT_VERSION=$(${TOOLS_DIR}/phpunit --version 2>/dev/null | grep -oP 'PHPUnit \K[0-9]+' || echo "0")
+        if [ "$PHPUNIT_VERSION" = "10" ]; then
+            ln -sf "$(readlink ${TOOLS_DIR}/phpunit)" "${TOOLS_DIR}/phpunit10" 2>/dev/null || true
+        fi
+    fi
+fi
+
+# Install PHP-CS-Fixer
+install_phive_tool "PHP-CS-Fixer" "php-cs-fixer"
+
+# Install PHPStan
+install_phive_tool "PHPStan" "phpstan"
+
+# Install Dephpend
+install_phive_tool "Dephpend" "dephpend"
+
+echo ""
+log_step "Step 4: Verifying installations"
+
+# Verify all tools
+echo ""
+echo "Installed Developer Tools:"
+echo "=========================="
+
+# Composer
+if command -v composer >/dev/null 2>&1; then
+    COMPOSER_VERSION=$(composer --version 2>/dev/null | head -n 1)
+    echo "  ✓ Composer: ${COMPOSER_VERSION}"
+else
+    echo "  ✗ Composer: NOT FOUND"
+fi
+
+# PHPUnit
+if command -v phpunit >/dev/null 2>&1; then
+    PHPUNIT_VERSION=$(phpunit --version 2>/dev/null | head -n 1)
+    echo "  ✓ PHPUnit: ${PHPUNIT_VERSION}"
+else
+    echo "  ✗ PHPUnit: NOT FOUND"
+fi
+
+# Check for PHPUnit 10/11 specifically
+if [ -f "${TOOLS_DIR}/phpunit11" ]; then
+    PHPUNIT11_VERSION=$(${TOOLS_DIR}/phpunit11 --version 2>/dev/null | head -n 1 || echo "unknown")
+    echo "  ✓ PHPUnit 11: ${PHPUNIT11_VERSION}"
+fi
+
+if [ -f "${TOOLS_DIR}/phpunit10" ]; then
+    PHPUNIT10_VERSION=$(${TOOLS_DIR}/phpunit10 --version 2>/dev/null | head -n 1 || echo "unknown")
+    echo "  ✓ PHPUnit 10: ${PHPUNIT10_VERSION}"
+fi
+
+# PHP-CS-Fixer
+if command -v php-cs-fixer >/dev/null 2>&1; then
+    PHPCS_VERSION=$(php-cs-fixer --version 2>/dev/null | head -n 1)
+    echo "  ✓ PHP-CS-Fixer: ${PHPCS_VERSION}"
+else
+    echo "  ✗ PHP-CS-Fixer: NOT FOUND"
+fi
+
+# PHPStan
+if command -v phpstan >/dev/null 2>&1; then
+    PHPSTAN_VERSION=$(phpstan --version 2>/dev/null | head -n 1)
+    echo "  ✓ PHPStan: ${PHPSTAN_VERSION}"
+else
+    echo "  ✗ PHPStan: NOT FOUND"
+fi
+
+# Dephpend
+if command -v dephpend >/dev/null 2>&1; then
+    DEPHPEND_VERSION=$(dephpend --version 2>/dev/null | head -n 1 || echo "Dephpend (version unknown)")
+    echo "  ✓ Dephpend: ${DEPHPEND_VERSION}"
+else
+    echo "  ✗ Dephpend: NOT FOUND"
+fi
+
+# PHIVE
+if command -v phive >/dev/null 2>&1; then
+    PHIVE_VERSION=$(phive --version 2>/dev/null | head -n 1)
+    echo "  ✓ PHIVE: ${PHIVE_VERSION}"
+else
+    echo "  ✗ PHIVE: NOT FOUND"
+fi
+
+echo ""
+log_info "Installation complete!"
+echo ""
+echo "Summary:"
+echo "========"
+echo "  - PHP 8.3, 8.4, and 8.5 installed with extensions"
+echo "  - PHIVE installed for PHAR management"
+echo "  - Composer installed globally"
+echo "  - PHPUnit 10 and 11 installed"
+echo "  - PHP-CS-Fixer installed"
+echo "  - PHPStan installed"
+echo "  - Dephpend installed"
+echo ""
+echo "Usage:"
+echo "  composer --version"
+echo "  phpunit --version"
+echo "  phpunit10 --version  # PHPUnit 10.x"
+echo "  phpunit11 --version  # PHPUnit 11.x"
+echo "  php-cs-fixer --version"
+echo "  phpstan --version"
+echo "  dephpend --version"
+echo "  phive list --global  # List all PHIVE-managed tools"
+echo ""
+echo "To update tools:"
+echo "  composer self-update"
+echo "  phive update --global"
+echo ""
diff --git a/scripts/install-ubuntu-24.04.sh b/scripts/install-ubuntu-24.04.sh
new file mode 100755
index 0000000..56fb57a
--- /dev/null
+++ b/scripts/install-ubuntu-24.04.sh
@@ -0,0 +1,200 @@
+#!/bin/bash
+#
+# Horde Development Environment Setup for Ubuntu 24.04 LTS (Noble)
+#
+# This script is idempotent - safe to run multiple times
+# Installs PHP 8.3, 8.4, and 8.5 with required extensions for Horde
+# Sets PHP 8.3 as the default version
+#
+# Usage: sudo bash install-ubuntu-24.04.sh
+#
+
+set -e  # Exit on error
+set -u  # Exit on undefined variable
+
+# Color output
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+NC='\033[0m' # No Color
+
+log_info() {
+    echo -e "${GREEN}[INFO]${NC} $1"
+}
+
+log_warn() {
+    echo -e "${YELLOW}[WARN]${NC} $1"
+}
+
+log_error() {
+    echo -e "${RED}[ERROR]${NC} $1"
+}
+
+# Check if running as root
+if [ "$EUID" -ne 0 ]; then
+    log_error "This script must be run as root (use sudo)"
+    exit 1
+fi
+
+log_info "Starting Horde development environment setup for Ubuntu 24.04..."
+
+# Update package list
+log_info "Updating package lists..."
+apt-get update -qq
+
+# Install prerequisites for adding PPAs
+log_info "Installing prerequisites..."
+apt-get install -y -qq software-properties-common apt-transport-https ca-certificates curl gnupg lsb-release
+
+# Add ondrej/php PPA if not already added
+if ! grep -q "^deb .*ondrej/php" /etc/apt/sources.list /etc/apt/sources.list.d/* 2>/dev/null; then
+    log_info "Adding ondrej/php PPA..."
+    add-apt-repository -y ppa:ondrej/php
+    apt-get update -qq
+else
+    log_info "ondrej/php PPA already configured"
+fi
+
+# Define PHP versions to install
+PHP_VERSIONS=("8.3" "8.4" "8.5")
+DEFAULT_PHP_VERSION="8.3"
+
+# Core PHP extensions required by Horde
+# Based on horde/base, horde/Core, horde/components composer.json requirements
+# and common Horde library dependencies
+CORE_EXTENSIONS=(
+    "cli"           # Command-line interface
+    "common"        # Common files
+    "fpm"           # FastCGI Process Manager
+    "bcmath"        # Arbitrary precision mathematics
+    "curl"          # cURL support
+    "gd"            # GD graphics library
+    "intl"          # Internationalization
+    "mbstring"      # Multibyte string support
+    "mysql"         # MySQL/MariaDB (mysqli + pdo_mysql)
+    "xml"           # XML support (dom, simplexml, xml, xmlreader, xmlwriter)
+    "zip"           # ZIP archive support
+    "soap"          # SOAP protocol support
+    "ldap"          # LDAP support
+    "imap"          # IMAP support
+    "tidy"          # Tidy HTML support
+    "readline"      # Readline support for CLI
+    "bz2"           # Bzip2 compression
+)
+
+# Extensions that should be checked for availability before installing
+CHECKED_EXTENSIONS=(
+    "opcache"       # Zend OPcache (may not be available for bleeding-edge PHP)
+)
+
+# Optional but recommended extensions
+OPTIONAL_EXTENSIONS=(
+    "apcu"          # APCu caching
+    "memcached"     # Memcached support
+    "imagick"       # ImageMagick support
+    "redis"         # Redis support
+    "xsl"           # XSL transformations
+    "pgsql"         # PostgreSQL support
+)
+
+# Install PHP versions and extensions
+for VERSION in "${PHP_VERSIONS[@]}"; do
+    log_info "Installing PHP ${VERSION}..."
+
+    # Build package list for this version
+    PACKAGES=()
+    PACKAGES+=("php${VERSION}")
+
+    # Add core extensions
+    for EXT in "${CORE_EXTENSIONS[@]}"; do
+        PACKAGES+=("php${VERSION}-${EXT}")
+    done
+
+    # Add checked extensions (don't fail if not available)
+    for EXT in "${CHECKED_EXTENSIONS[@]}"; do
+        if apt-cache show "php${VERSION}-${EXT}" >/dev/null 2>&1; then
+            PACKAGES+=("php${VERSION}-${EXT}")
+        else
+            log_warn "Extension php${VERSION}-${EXT} not available, skipping"
+        fi
+    done
+
+    # Add optional extensions (don't fail if not available)
+    for EXT in "${OPTIONAL_EXTENSIONS[@]}"; do
+        if apt-cache show "php${VERSION}-${EXT}" >/dev/null 2>&1; then
+            PACKAGES+=("php${VERSION}-${EXT}")
+        else
+            log_warn "Optional extension php${VERSION}-${EXT} not available"
+        fi
+    done
+
+    # Install all packages for this version
+    log_info "Installing ${#PACKAGES[@]} packages for PHP ${VERSION}..."
+    apt-get install -y -qq "${PACKAGES[@]}"
+
+    log_info "PHP ${VERSION} installation complete"
+done
+
+# Set default PHP version using update-alternatives
+log_info "Setting PHP ${DEFAULT_PHP_VERSION} as default..."
+
+# Only set if not already the default
+CURRENT_DEFAULT=$(update-alternatives --query php 2>/dev/null | grep "^Value:" | awk '{print $2}' || echo "")
+DESIRED_DEFAULT="/usr/bin/php${DEFAULT_PHP_VERSION}"
+
+if [ "$CURRENT_DEFAULT" != "$DESIRED_DEFAULT" ]; then
+    update-alternatives --set php "$DESIRED_DEFAULT"
+    log_info "Default PHP set to ${DEFAULT_PHP_VERSION}"
+else
+    log_info "PHP ${DEFAULT_PHP_VERSION} is already the default"
+fi
+
+# Verify installations
+log_info "Verifying PHP installations..."
+echo ""
+echo "Installed PHP versions:"
+echo "======================="
+
+for VERSION in "${PHP_VERSIONS[@]}"; do
+    if command -v "php${VERSION}" >/dev/null 2>&1; then
+        FULL_VERSION=$("php${VERSION}" -r "echo PHP_VERSION;")
+        echo "  PHP ${VERSION}: ${FULL_VERSION}"
+    else
+        log_error "PHP ${VERSION} not found!"
+    fi
+done
+
+echo ""
+DEFAULT_VERSION=$(php -r "echo PHP_VERSION;")
+echo "Default PHP version: ${DEFAULT_VERSION}"
+echo ""
+
+# Display FPM status
+log_info "PHP-FPM status (installed but not configured):"
+for VERSION in "${PHP_VERSIONS[@]}"; do
+    if systemctl list-unit-files | grep -q "php${VERSION}-fpm.service"; then
+        STATUS=$(systemctl is-enabled "php${VERSION}-fpm.service" 2>/dev/null || echo "disabled")
+        echo "  php${VERSION}-fpm: ${STATUS}"
+    fi
+done
+
+echo ""
+log_info "Installation complete!"
+echo ""
+echo "Summary:"
+echo "========"
+echo "  - PHP 8.3, 8.4, and 8.5 installed with required extensions"
+echo "  - Default PHP: ${DEFAULT_PHP_VERSION}"
+echo "  - PHP-FPM installed but not started/enabled"
+echo "  - All core Horde extensions installed"
+echo ""
+echo "Usage:"
+echo "  Default PHP:  php --version"
+echo "  PHP 8.3:      php8.3 --version"
+echo "  PHP 8.4:      php8.4 --version"
+echo "  PHP 8.5:      php8.5 --version"
+echo ""
+echo "To start PHP-FPM for a specific version:"
+echo "  systemctl start php8.3-fpm"
+echo "  systemctl enable php8.3-fpm"
+echo ""