desk-moloni/PHP_MIGRATION_TIMELINE.md

⏰ PHP 8.4 MIGRATION TIMELINE

desk-moloni: Detailed Implementation Schedule

Start Date: 2025-09-13 (Tomorrow)
Target Completion: 2025-10-04 (3 weeks)
Critical Deadline: Security compliance required

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📅 PHASE-BY-PHASE TIMELINE

🚀 PHASE 1: ASSESSMENT & PREPARATION

Duration: 3 days (Sep 13-15)
Team: Development Lead + 1 Developer
Risk Level: LOW

Day 1 (Friday, Sep 13) - Environment Analysis

Morning (4h):

• 09:00-10:00 Create migration branch: php-8.4-migration
• 10:00-11:00 Run complete codebase audit with PHP 8.4 compatibility tools
• 11:00-12:00 Document current test coverage and performance baseline
• 12:00-13:00 Analyze composer dependencies for PHP 8.4 compatibility

Afternoon (4h):

• 14:00-15:00 Set up PHP 8.4 development environment
• 15:00-16:00 Create compatibility testing suite
• 16:00-17:00 Generate current performance benchmarks
• 17:00-18:00 Document findings and prepare weekend tasks

Deliverables:

• Migration branch created and pushed
• PHP 8.4 environment configured
• Baseline metrics captured
• Risk assessment completed

Day 2 (Monday, Sep 16) - Dependency Analysis

Morning (4h):

• 09:00-10:00 Test composer update with PHP 8.4 constraints
• 10:00-11:00 Identify any problematic dependencies
• 11:00-12:00 Research alternative packages if needed
• 12:00-13:00 Create dependency upgrade plan

Afternoon (4h):

• 14:00-15:00 Update composer.json requirements
• 15:00-16:00 Run composer update --dry-run to preview changes
• 16:00-17:00 Test critical dependencies individually
• 17:00-18:00 Commit dependency configuration updates

Deliverables:

• Updated composer.json with PHP 8.4 requirements
• Dependency compatibility matrix
• Alternative packages identified (if needed)

Day 3 (Tuesday, Sep 17) - Code Analysis Deep Dive

Morning (4h):

• 09:00-10:00 Scan all PHP files for deprecated features
• 10:00-11:00 Identify error suppression usage patterns
• 11:00-12:00 Analyze version check implementations
• 12:00-13:00 Create automated fixing scripts where possible

Afternoon (4h):

• 14:00-15:00 Review PHPUnit configuration requirements
• 15:00-16:00 Test sample files with PHP 8.4
• 16:00-17:00 Document all required code changes
• 17:00-18:00 Prioritize changes by risk and complexity

Deliverables:

• Complete code compatibility report
• Prioritized fix list
• Automated update scripts ready
• PHPUnit migration plan

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🔧 PHASE 2: ENVIRONMENT SETUP

Duration: 2 days (Sep 18-19)
Team: DevOps Engineer + Development Lead
Risk Level: MEDIUM

Day 4 (Wednesday, Sep 18) - Development Environment

Morning (4h):

• 09:00-10:00 Install PHP 8.4 on development machines
• 10:00-11:00 Configure Apache/Nginx for PHP 8.4
• 11:00-12:00 Test basic PHP functionality
• 12:00-13:00 Install required PHP extensions

Afternoon (4h):

• 14:00-15:00 Update Composer to latest version
• 15:00-16:00 Test composer install with new requirements
• 16:00-17:00 Configure IDE/editors for PHP 8.4
• 17:00-18:00 Set up debugging and profiling tools

Deliverables:

• PHP 8.4 development environment fully operational
• All team members have access to updated environment
• Development tools configured

Day 5 (Thursday, Sep 19) - Staging Environment

Morning (4h):

• 09:00-10:00 Provision staging server with PHP 8.4
• 10:00-11:00 Configure staging database
• 11:00-12:00 Deploy current codebase to staging
• 12:00-13:00 Test basic functionality on staging

Afternoon (4h):

• 14:00-15:00 Set up monitoring and logging on staging
• 15:00-16:00 Configure automated deployment pipeline
• 16:00-17:00 Create staging validation checklist
• 17:00-18:00 Document staging access and procedures

Deliverables:

• Staging environment operational with PHP 8.4
• Deployment pipeline configured
• Monitoring and logging active
• Team access configured

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💻 PHASE 3: CODE MIGRATION

Duration: 7 days (Sep 20-28)
Team: 2 Developers + Development Lead
Risk Level: HIGH

Day 6 (Friday, Sep 20) - Core Framework Updates

Morning (4h):

• 09:00-10:00 Update main module PHP version checks
• 10:00-11:00 Update configuration files with new PHP requirements
• 11:00-12:00 Fix composer.json and run composer update
• 12:00-13:00 Initial testing with updated dependencies

Afternoon (4h):

• 14:00-15:00 Update PHPUnit configuration to v12.x schema
• 15:00-16:00 Fix any PHPUnit configuration issues
• 16:00-17:00 Run basic test suite to identify broken tests
• 17:00-18:00 Document test failures and needed fixes

Deliverables:

• Core version requirements updated
• Composer dependencies upgraded
• PHPUnit v12.x configured
• Test failures documented

Day 7 (Monday, Sep 23) - Error Handling Improvements

Morning (4h):

• 09:00-10:00 Review all error suppression usage
• 10:00-11:00 Replace critical @ operators with try-catch
• 11:00-12:00 Update database operation error handling
• 12:00-13:00 Test improved error handling

Afternoon (4h):

• 14:00-15:00 Update API communication error handling
• 15:00-16:00 Improve file operation error handling
• 16:00-17:00 Add logging for previously suppressed errors
• 17:00-18:00 Test error handling improvements

Deliverables:

• Error suppression reduced by 80%+
• Improved error logging implemented
• Better exception handling throughout codebase

Day 8 (Tuesday, Sep 24) - Library and Model Updates

Morning (4h):

• 09:00-10:00 Update MoloniApiClient for PHP 8.4 compatibility
• 10:00-11:00 Test OAuth token handling
• 11:00-12:00 Update sync service libraries
• 12:00-13:00 Test API integrations

Afternoon (4h):

• 14:00-15:00 Update all model classes
• 15:00-16:00 Test database operations
• 16:00-17:00 Update queue processing system
• 17:00-18:00 Test queue functionality

Deliverables:

• All library classes PHP 8.4 compatible
• API integrations working
• Database operations validated
• Queue system operational

Day 9 (Wednesday, Sep 25) - Controller and View Updates

Morning (4h):

• 09:00-10:00 Update admin controllers
• 10:00-11:00 Update client portal controllers
• 11:00-12:00 Test admin dashboard functionality
• 12:00-13:00 Test client portal features

Afternoon (4h):

• 14:00-15:00 Update view templates if needed
• 15:00-16:00 Test webhook controllers
• 16:00-17:00 Update OAuth controllers
• 17:00-18:00 Complete end-to-end functionality testing

Deliverables:

• All controllers updated and tested
• Admin dashboard fully operational
• Client portal functioning
• Webhook system working

Day 10-12 (Thursday-Saturday, Sep 26-28) - Testing and Optimization

Each Day Schedule (8h):

• Morning: Run comprehensive test suites
• Afternoon: Fix any failing tests and optimize performance

Day 10 Focus: Unit Tests

• Fix all failing unit tests
• Add new tests for error handling improvements
• Ensure 80%+ code coverage maintained

Day 11 Focus: Integration Tests

• Fix all failing integration tests
• Test API integrations thoroughly
• Validate database synchronization

Day 12 Focus: End-to-End Testing

• Complete workflow testing
• Performance benchmarking
• Security validation

Deliverables:

• All test suites passing
• Performance benchmarks improved
• Security validation complete

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🧪 PHASE 4: VALIDATION & TESTING

Duration: 4 days (Sep 29 - Oct 2)
Team: QA Engineer + 2 Developers
Risk Level: MEDIUM

Day 13 (Sunday, Sep 29) - Comprehensive Test Suite

Morning (4h):

• 09:00-10:00 Run complete unit test suite
• 10:00-11:00 Run integration test suite
• 11:00-12:00 Run end-to-end test suite
• 12:00-13:00 Document any failing tests

Afternoon (4h):

• 14:00-15:00 Fix critical test failures
• 15:00-16:00 Re-run failed tests
• 16:00-17:00 Performance benchmarking
• 17:00-18:00 Compare with baseline metrics

Deliverables:

• All test suites passing
• Performance improvements confirmed
• Critical issues resolved

Day 14 (Monday, Sep 30) - API Integration Validation

Morning (4h):

• 09:00-10:00 Test DeskCRM API connectivity
• 10:00-11:00 Test Moloni API authentication
• 11:00-12:00 Test OAuth 2.0 flow complete cycle
• 12:00-13:00 Test webhook endpoints

Afternoon (4h):

• 14:00-15:00 Test customer synchronization workflows
• 15:00-16:00 Test invoice processing workflows
• 16:00-17:00 Test queue processing under load
• 17:00-18:00 Test error handling scenarios

Deliverables:

• All API integrations validated
• Synchronization workflows working
• Queue processing tested under load
• Error scenarios handled properly

Day 15 (Tuesday, Oct 1) - User Interface and Experience Testing

Morning (4h):

• 09:00-10:00 Test admin dashboard complete functionality
• 10:00-11:00 Test client portal all features
• 11:00-12:00 Test configuration management
• 12:00-13:00 Test reporting and logging features

Afternoon (4h):

• 14:00-15:00 Test mobile responsiveness
• 15:00-16:00 Test browser compatibility
• 16:00-17:00 Test accessibility features
• 17:00-18:00 Document UX issues if any

Deliverables:

• All UI features validated
• Cross-browser compatibility confirmed
• Mobile responsiveness verified
• Accessibility standards met

Day 16 (Wednesday, Oct 2) - Security and Performance Validation

Morning (4h):

• 09:00-10:00 Run security audit
• 10:00-11:00 Test authentication mechanisms
• 11:00-12:00 Test data encryption
• 12:00-13:00 Validate OAuth security

Afternoon (4h):

• 14:00-15:00 Performance load testing
• 15:00-16:00 Memory usage validation
• 16:00-17:00 Response time benchmarking
• 17:00-18:00 Generate final test report

Deliverables:

• Security audit passed
• Performance improvements confirmed
• Load testing results documented
• Final validation report complete

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🚀 PHASE 5: PRODUCTION DEPLOYMENT

Duration: 2 days (Oct 3-4)
Team: DevOps + Development Lead + QA
Risk Level: HIGH

Day 17 (Thursday, Oct 3) - Staging Final Validation

Morning (4h):

• 09:00-10:00 Deploy complete migration to staging
• 10:00-11:00 Run full regression testing on staging
• 11:00-12:00 Test with production-like data volume
• 12:00-13:00 Validate backup and restore procedures

Afternoon (4h):

• 14:00-15:00 Test rollback procedures
• 15:00-16:00 Validate monitoring and alerting
• 16:00-17:00 Final stakeholder review
• 17:00-18:00 Production deployment planning meeting

Deliverables:

• Staging fully validated
• Rollback procedures tested
• Stakeholder approval obtained
• Production deployment plan finalized

Day 18 (Friday, Oct 4) - Production Deployment

Morning (4h):

• 09:00-09:30 Final production backup
• 09:30-10:00 Deploy PHP 8.4 to production server
• 10:00-10:30 Deploy updated codebase
• 10:30-11:00 Run database migrations if needed
• 11:00-11:30 Restart services and validate
• 11:30-12:00 Run smoke tests on production
• 12:00-13:00 Monitor systems for stability

Afternoon (4h):

• 14:00-15:00 Complete functional validation
• 15:00-16:00 Performance monitoring and validation
• 16:00-17:00 User acceptance testing with key stakeholders
• 17:00-18:00 Go-live confirmation and documentation

Deliverables:

• Production deployment successful
• All systems operational
• Performance improvements confirmed
• Stakeholder acceptance obtained

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📊 RESOURCE ALLOCATION

Team Members and Time Commitment

Role	Phase 1	Phase 2	Phase 3	Phase 4	Phase 5	Total
Development Lead	24h	16h	56h	16h	16h	128h
Senior Developer	8h	8h	56h	32h	8h	112h
DevOps Engineer	4h	32h	8h	8h	32h	84h
QA Engineer	4h	4h	8h	32h	16h	64h

Total Effort: 388 hours (48.5 person-days)

Budget Estimation (if outsourced)

• Development Lead (128h × €75): €9,600
• Senior Developer (112h × €65): €7,280
• DevOps Engineer (84h × €70): €5,880
• QA Engineer (64h × €55): €3,520
• Tools & Infrastructure: €1,000
• Total Estimated Cost: €27,280

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⚠️ RISK MITIGATION SCHEDULE

Critical Risk Checkpoints

Checkpoint 1 (Day 3): Compatibility Assessment

• Risk: Major compatibility issues discovered
• Mitigation: If >10 critical issues found, extend Phase 3 by 2 days
• Go/No-Go Decision Point

Checkpoint 2 (Day 8): Core Framework Migration

• Risk: Core systems not working with PHP 8.4
• Mitigation: Have rollback plan ready, extend timeline if needed
• Escalation: Technical Director involvement required

Checkpoint 3 (Day 12): Test Suite Validation

• Risk: Test failures indicating fundamental issues
• Mitigation: 48-hour intensive debugging session scheduled
• Success Criteria: >95% test pass rate required

Checkpoint 4 (Day 16): Security Validation

• Risk: Security vulnerabilities introduced
• Mitigation: Security audit by external consultant if needed
• Escalation: CISO approval required for production

Checkpoint 5 (Day 17): Production Readiness

• Risk: Systems not production-ready
• Mitigation: Delay production deployment, continue on staging
• Success Criteria: All stakeholders must approve

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📱 DAILY STANDUPS SCHEDULE

Daily Meeting Times

• Time: 09:00-09:15 (15 minutes)
• Participants: Development Lead, Developers, DevOps, QA
• Format:
  • What was completed yesterday?
  • What will be worked on today?
  • Any blockers or concerns?
  • Risk level assessment

Weekly Status Reports

• When: End of each week (Friday 17:30)
• To: Project Manager, Technical Director, Stakeholders
• Content:
  • Progress against timeline
  • Issues encountered and resolutions
  • Risk assessment update
  • Next week priorities

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🎯 SUCCESS METRICS TRACKING

Daily Metrics

• Test pass rate (target: >90%)
• Code coverage (maintain >80%)
• Critical errors (target: 0)
• Performance baseline comparison

Weekly Metrics

• Feature completeness percentage
• Security scan results
• Stakeholder feedback score
• Timeline adherence percentage

Final Success Criteria

• ✅ All test suites passing (100%)
• ✅ Performance improved by 10%+
• ✅ Security audit passed
• ✅ Zero critical production issues
• ✅ Stakeholder approval obtained
• ✅ Documentation complete

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📞 ESCALATION MATRIX

Level 1 - Technical Issues (Response: 2 hours)

Contact: Development Lead
Scope: Code issues, test failures, minor compatibility problems

Level 2 - Integration Issues (Response: 1 hour)

Contact: Development Lead + DevOps Engineer
Scope: Environment issues, deployment problems, system integration

Level 3 - Business Impact (Response: 30 minutes)

Contact: Project Manager + Technical Director
Scope: Timeline delays, budget concerns, scope changes

Level 4 - Critical Production (Response: 15 minutes)

Contact: CTO + Infrastructure Team
Scope: Production down, security breach, data corruption

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📋 WEEKEND WORK PLAN

Weekend 1 (Sep 14-15)

Optional preparatory work:

• Research PHP 8.4 new features
• Review competitor migration experiences
• Prepare additional test scenarios

Weekend 2 (Sep 21-22)

Critical development time:

• Extended testing sessions
• Performance optimization
• Bug fixing marathon if needed

Weekend 3 (Sep 28-29)

Pre-deployment validation:

• Final security review
• Complete system testing
• Production readiness validation

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🎉 CELEBRATION MILESTONES

Phase Completion Celebrations

• Phase 1 Complete: Team lunch - migration plan approved
• Phase 3 Complete: Team dinner - core migration finished
• Production Deployment: Company announcement - security enhanced

Recognition Plan

• Individual recognition for team members exceeding expectations
• Company-wide communication highlighting security improvement
• Case study documentation for future migrations

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📝 FINAL CHECKLIST

Pre-Deployment Checklist (Day 17)

• All automated tests passing
• Manual testing complete
• Performance benchmarks improved
• Security audit passed
• Documentation updated
• Stakeholder approval obtained
• Rollback plan tested
• Monitoring configured
• Backup verified
• Team briefed on deployment

Post-Deployment Checklist (Day 18)

• Production deployment successful
• All services responding
• Performance metrics within targets
• No critical errors in logs
• User acceptance confirmed
• Monitoring active
• Documentation updated
• Team debriefing completed
• Lessons learned documented
• Success metrics reported

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Timeline Owner: System Development Agent
Last Updated: 2025-09-12
Next Review: 2025-09-13 (Start of Phase 1)

This timeline is a living document and should be updated daily during the migration process.