Update documentation with PHP optimizer and establish development log

DOCUMENTATION UPDATES: README.md changes: - Added php-optimizer.sh to performance modules section - Added 3 new libraries: php-detector.sh, php-analyzer.sh, php-config-manager.sh - Added comprehensive PHP Configuration Optimizer feature description - Updated with all capabilities (7-day analysis, OPcache tuning, auto-backup, rollback) DEVELOPMENT_LOG.md (NEW): - Comprehensive tracking document for ALL development work - Detailed documentation of PHP optimizer (Dec 2-3, 2025) - Component breakdown: 4 files, 2,960 lines, 45 functions - Complete workflow documentation for Option 4 - Safety features and testing status documented - Git commit history tracked - Development guidelines established - Placeholder sections for Nov 21-30 work to be filled in DEVELOPMENT GUIDELINES ESTABLISHED: - NO AI attribution in commits (per user instructions) - Update DEVELOPMENT_LOG.md with every change - Track file statistics and testing status - Document all git commits and decisions This establishes proper ongoing documentation practices going forward.
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+# Server Toolkit Development Log
+
+**Purpose**: Comprehensive tracking of ALL development work, changes, and decisions
+**Last Updated**: 2025-12-03
+
+---
+
+## December 2-3, 2025: PHP Configuration Optimizer (Complete)
+
+### Summary
+Built comprehensive PHP configuration optimization system with 7 phases of development.
+
+### Components Created
+
+#### 1. lib/php-detector.sh (428 lines, 17 functions)
+**Purpose**: Detect and locate all PHP configuration files across control panels
+**Created**: December 2, 2025
+
+**Functions**:
+- `detect_php_version_for_domain()` - Detect PHP version per domain
+- `detect_php_binary()` - Find PHP binary path
+- `find_php_ini()` - Locate php.ini files (4 priority levels)
+- `find_fpm_pool_config()` - Find PHP-FPM pool configs
+- `find_all_php_configs()` - Comprehensive config discovery
+- `get_opcache_config_file()` - Locate OPcache configs
+- 11 additional detection functions
+
+**Control Panel Support**:
+- cPanel (ea-php, MultiPHP)
+- InterWorx (SiteWorx)
+- Plesk
+- Standalone Apache
+
+#### 2. lib/php-analyzer.sh (940 lines, 14 functions)
+**Purpose**: Analyze PHP performance metrics and generate recommendations
+**Created**: December 2, 2025
+
+**Functions**:
+- `get_opcache_stats()` - Extract OPcache statistics
+- `calculate_opcache_hit_rate()` - Calculate hit percentage
+- `check_max_children_errors()` - Scan 7-day error logs
+- `analyze_php_memory_usage()` - Memory consumption analysis
+- `get_process_manager_stats()` - PHP-FPM pm stats
+- `recommend_max_children()` - Calculate optimal max_children
+- `recommend_memory_limit()` - Calculate optimal memory_limit
+- `recommend_opcache_settings()` - OPcache tuning recommendations
+- 6 additional analysis functions
+
+**Key Features**:
+- 7-day historical error log analysis
+- OPcache hit rate calculation with division-by-zero protection
+- Intelligent max_children recommendations based on actual errors
+- Memory limit optimization based on real usage patterns
+
+#### 3. lib/php-config-manager.sh (509 lines, 14 functions)
+**Purpose**: Backup, restore, and modify PHP configurations safely
+**Created**: December 2, 2025
+
+**Functions**:
+- `backup_user_php_configs()` - Create timestamped backups with metadata
+- `restore_from_backup()` - Restore from backup with verification
+- `list_backups()` - Display all available backups
+- `delete_backup()` - Remove backup directories
+- `modify_fpm_pool_setting()` - Modify PHP-FPM pool settings via sed
+- `modify_php_ini_setting()` - Modify php.ini settings
+- `apply_fpm_pool_settings()` - Batch apply multiple settings
+- `restart_php_fpm()` - Restart PHP-FPM service
+- `reload_php_fpm()` - Graceful reload (zero downtime)
+- `verify_php_fpm_running()` - Verify service status
+- 4 additional configuration functions
+
+**Backup System**:
+- Location: `/root/server-toolkit/backups/php/`
+- Format: Timestamped directories with metadata
+- Preserves directory structure and permissions
+- Tracks all backed up files with original paths
+
+#### 4. modules/performance/php-optimizer.sh (1,083 lines)
+**Purpose**: Interactive menu-driven PHP optimization tool
+**Created**: December 2, 2025
+
+**Menu Options**:
+1. Analyze All Domains - Comprehensive server-wide analysis
+2. Analyze Single Domain - Per-domain analysis
+3. Show OPcache Statistics - OPcache performance metrics
+4. Optimize Domain - **Main action menu with apply workflow**
+5. View PHP Error Logs - Error log viewer with filtering
+6. PHP Version Summary - Version distribution report
+7. Find Configuration Files - Config file discovery tool
+8. Backup Configurations (b) - Manual backup creation
+9. Restore from Backup (r) - Rollback capability
+0. Quit
+
+**Option 4 Workflow** (Optimize Domain):
+1. Select domain from list
+2. Display current configuration
+3. Show recommendations with explanations
+4. Ask: "Apply these recommendations? (y/n)"
+5. If yes: Create auto-backup (timestamped)
+6. Apply changes to PHP-FPM pool config
+7. Ask: "Restart PHP-FPM now? (y/n)"
+8. If yes: Gracefully reload PHP-FPM (zero downtime)
+9. Verify service is running
+10. Display backup location for rollback
+
+**Safety Features**:
+- User confirmation required for ALL changes
+- Auto-backup BEFORE any modifications
+- Graceful reload (not restart) for zero downtime
+- Verification that service is running after reload
+- Clear rollback instructions with backup location
+- No automatic changes without explicit approval
+
+### Integration (December 3, 2025)
+
+#### Main Menu Integration
+**File**: `launcher.sh`
+**Location**: Performance & Diagnostics → Option 9
+
+**Menu Path**:
+```
+Main Menu
+  └─ (4) Performance & Diagnostics
+      └─ (9) PHP Configuration Optimizer
+```
+
+**Changes Made**:
+- Added menu option 9: "PHP Configuration Optimizer"
+- Updated handler function to call `php-optimizer.sh`
+- Shifted existing options 9-11 to 10-12
+- Validated syntax with `bash -n`
+
+### Git Commits
+
+1. **Phase 1**: Create lib/php-detector.sh (detection functions)
+2. **Phase 2**: Create lib/php-analyzer.sh (analysis engine)
+3. **Phase 3**: Create modules/performance/php-optimizer.sh (main script)
+4. **Phase 4**: Implement backup/restore system with PHP-FPM restart
+5. **Phase 5 & 6**: Implement apply/action menu with auto-backup and PHP-FPM restart
+6. **Phase 7**: Integrate PHP Configuration Optimizer into main menu
+
+**Note**: Removed AI attribution markers from commits per user instructions.
+
+### Documentation Created
+
+1. `PHP_OPTIMIZER_PLAN.md` - Initial planning document
+2. `PHP_METRICS_COMPREHENSIVE.md` - Comprehensive metrics tracking
+3. `PHP_CONFIG_LOCATIONS_COMPLETE.md` - Config file locations by panel
+4. `SESSION_SUMMARY.md` - Session work summary
+5. `PHP_OPTIMIZER_COMPLETE.md` - Completion documentation
+6. `DEVELOPMENT_LOG.md` - This file (NEW!)
+
+### Testing Status
+- ✅ Syntax validation complete (all files pass `bash -n`)
+- ✅ Logic validation complete (division-by-zero protection, error handling)
+- ✅ Path resolution verified
+- ✅ Menu integration tested
+- ⏳ **Pending**: Live server testing with real domains
+
+### Metrics Tracked
+
+**Per-Domain PHP Settings**:
+- `pm.max_children` - FPM process limit
+- `pm.start_servers` - Initial processes
+- `pm.min_spare_servers` - Minimum idle processes
+- `pm.max_spare_servers` - Maximum idle processes
+- `pm.max_requests` - Process recycling threshold
+- `memory_limit` - PHP script memory cap
+- `upload_max_filesize` - Upload size limit
+- `post_max_size` - POST data limit
+- `max_execution_time` - Script timeout
+- `max_input_time` - Input parsing timeout
+
+**OPcache Settings**:
+- `opcache.memory_consumption` - OPcache memory allocation
+- `opcache.interned_strings_buffer` - String storage buffer
+- `opcache.max_accelerated_files` - Cached file limit
+- `opcache.enable` - OPcache on/off
+- `opcache.revalidate_freq` - Cache validation frequency
+
+**Performance Metrics**:
+- OPcache hit rate (hits / (hits + misses))
+- max_children error frequency (7-day history)
+- Active PHP-FPM processes
+- Memory consumption per process
+- Process manager type (static/dynamic/ondemand)
+
+### File Statistics
+
+**Total Lines of Code**: 2,960 lines
+- lib/php-detector.sh: 428 lines
+- lib/php-analyzer.sh: 940 lines
+- lib/php-config-manager.sh: 509 lines
+- modules/performance/php-optimizer.sh: 1,083 lines
+
+**Total Functions**: 45 exported functions
+- php-detector.sh: 17 functions
+- php-analyzer.sh: 14 functions
+- php-config-manager.sh: 14 functions
+
+### Future Enhancements (Planned)
+
+1. **MySQL Config Optimizer** - Similar system for MySQL/MariaDB tuning
+2. **Redis/Memcached Setup** - Object caching setup scripts
+3. **Apache/Nginx Optimizer** - Web server tuning (revisit later)
+
+**Not Planned**:
+- CDN integration (user declined)
+- SSL/TLS optimizer (user declined)
+
+---
+
+## November 21-30, 2025: (Previous Work - Need to Fill In)
+
+**TODO**: Document all work from November 21-30 including:
+- enable-cphulk.sh bug fixes (6 bugs fixed)
+- live-attack-monitor color code fixes
+- SCRIPT_DIR path calculation fixes
+- bot-analyzer optimizations
+- Any other modules created or modified
+
+---
+
+## November 20, 2025: (Last Documented Work)
+
+**TODO**: Pull from previous documentation what was done on this date.
+
+---
+
+## Development Guidelines
+
+### Git Commit Messages
+- **NO AI attribution markers** (per user instructions as of Dec 3, 2025)
+- Remove "🤖 Generated with Claude Code"
+- Remove "Co-Authored-By: Claude <noreply@anthropic.com>"
+- Use clear, descriptive commit messages
+- Include technical details and impact
+
+### Documentation Standards
+- Update DEVELOPMENT_LOG.md with EVERY change
+- Update README.md for user-facing features
+- Create detailed docs/ files for complex features
+- Track file statistics (lines, functions)
+- Document all git commits
+- Record testing status
+
+### Code Standards
+- Follow CODING_GUIDELINES.md
+- Syntax validation with `bash -n` before commit
+- Export all library functions
+- Proper error handling and user confirmations
+- No automatic changes without user approval
+- Graceful service reloads (not restarts)
+
+---
+
+**Last Updated**: 2025-12-03 21:45 UTC
+**Next Update**: After next development session