v0.3.3 — Security & Modernization Audit

Summary

Complete security and modernization audit of MU-Migration. 32 defects identified and fixed.

Highlights

• Dependency removal: Replaced abandoned alchemy/zippy with native PHP ZipArchive
• PHP 8.0+ required: Updated minimum version, uses str_contains(), random_bytes(), named constants
• Deprecated API cleanup: Replaced insert_blog(), get_blog_details(), $GLOBALS['current_site']
• Defense-in-depth hardening: Input validation, path traversal guards, atomic file writes, argument sanitization
• CI modernization: Replaced .travis.yml with GitHub Actions

Fixed Defects

ID	Description
DEF-001	DB prefix format validation
DEF-003	Replace deprecated insert_blog() with wp_insert_site()
DEF-006	Replace deprecated get_blog_details() with get_site()
DEF-008	Zip path traversal protection
DEF-010	Atomic map file writes
DEF-011	Cross-filesystem rename fallback
DEF-012	Idempotent site creation
DEF-013	Plugin destination path validation
DEF-017	Role validation before set_role()
DEF-018	Password hash format validation
DEF-019	Replace deprecated $GLOBALS['current_site']
DEF-020	Stop resetting $wp_actions
DEF-021	Include all tables with prefix in search-replace
DEF-022	Warn on multiple user matches
DEF-025	Sanitize runcommand() argument keys
DEF-026	Table name validation
DEF-027	Remove error suppression in delete_folder()
DEF-028	Guard fgets() false return
DEF-029	i18n — accepted as-is (CLI tool, no translations)
DEF-030	Atomic rename in addTransaction()
DEF-031	Validate blog_id before switch_to_blog()

Breaking Changes

• PHP 8.0+ required (was 7.1)
• ext-zip required (replaces alchemy/zippy)
• helpers.php function extract() renamed to extract_zip()

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