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<p>SM Easy Post Migrator helps you move your WordPress content from one site to another. Use it to migrate posts, pages, images, and other media files between WordPress sites without losing your content or breaking links.</p>
<p><strong>What You Can Do:</strong></p>
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<p><strong>Migrate Posts and Pages:</strong> Copy your blog posts, pages, and content from your old site to your new site. All your text, formatting, and content structure is preserved.</p>
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<p><strong>Move Images and Media:</strong> Automatically download and import all images, videos, and media files from your source site. The plugin checks for duplicates so you don’t end up with multiple copies of the same file.</p>
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<p><strong>Fix Internal Links:</strong> When you move content, all the links between your posts and pages are automatically updated to work on your new site. No broken links!</p>
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<p><strong>Choose What to Migrate:</strong> Browse your source site and pick exactly which posts, pages, or media files you want to move. You’re in control.</p>
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<p><strong>Track Your Progress:</strong> See detailed logs of what was migrated, what succeeded, and what had issues. Export these logs to CSV if you need to review them later.</p>
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<p><strong>Easy to Use:</strong> Connect to your source site using your WordPress username and application password, then select what you want to migrate. The plugin handles the rest.</p>
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<p>Perfect for moving your blog to a new domain, consolidating multiple sites, or backing up your content to a new location.</p>
<h3>License</h3>
<p>This plugin is licensed under the GPL v2 or later.</p>
<h3>Support</h3>
<p>For support, feature requests, or bug reports, visit <a href="https://wordpress.org/support/plugin/sm-easy-post-migrator/" rel="ugc">https://wordpress.org/support/plugin/sm-easy-post-migrator/</a></p>
<h3>Contributors & Developers</h3>
<p>“SM Easy Post Migrator” is open source software. The following people have contributed to this plugin.</p>


SM Easy Post Migrator

Migrate posts, pages, media, and internal links between WordPress sites without breaking links or losing images.

<p>MksDdn Migrate Content is a clean-room migration suite that packages your site into deterministic <code>.wpbkp</code> archives. Each bundle contains a manifest, checksum, database segments, media, selected files, and user decisions, so imports stay predictable.</p>
<h4>Why MksDdn Migrate Content?</h4>
<ul>
<li><strong>Dual export modes</strong> – choose Full Site (database + uploads/plugins/mu-plugins/themes) or Selected Content (multi-select posts/pages/CPTs) with or without referenced media.</li>
<li><strong>Chunked pipeline</strong> – large archives stream through REST API endpoints with resume tokens, so multi‑GB transfers survive flaky networks.</li>
<li><strong>User merge control</strong> – compare archive vs current users and decide how to merge conflicts.</li>
<li><strong>Theme import mode</strong> – when a theme archive is detected, choose replace vs merge before applying changes.</li>
<li><strong>Integrity & safety</strong> – <code>.wpbkp</code> archives ship with manifests and checksums; imports verify capabilities, nonces, and disk space before touching data.</li>
<li><strong>Import preflight</strong> – unified import is a two-step flow: run preflight (read-only report), then start the real import from the report without uploading the file again (browser uploads are staged server-side between steps).</li>
</ul>
<h4>Feature Highlights</h4>
<ul>
<li>Archive format with manifest, checksum, and payload folders (<code>content.json</code>, <code>media/</code>, <code>options/</code>, filesystem slices).</li>
<li>Media scanner that collects featured images, galleries, attachments referenced inside blocks or shortcodes.</li>
<li>File-system coverage for <code>wp-content/uploads</code>, <code>wp-content/plugins</code>, <code>wp-content/mu-plugins</code>, <code>wp-content/themes</code> with filters to skip VCS/system files.</li>
<li>Chunked upload/download JS client with live progress, auto-resume, and graceful fallback to direct transfer.</li>
<li>Server file import – select backup files directly from <code>wp-content/uploads/mksddn-mc/imports/</code> directory without browser uploads.</li>
<li>Custom <code>.wpbkp</code> drag-and-drop uploader with checksum guardrails (UI polish deferred to next milestone, functionality already complete).</li>
</ul>
<h3>Architecture</h3>
<p>The plugin follows SOLID principles and WordPress Coding Standards with a clean, modular architecture:</p>
<h4>Service Container & Dependency Injection</h4>
<ul>
<li>Centralized <code>ServiceContainer</code> manages all dependencies</li>
<li>Service Providers (<code>CoreServiceProvider</code>, <code>AdminServiceProvider</code>, <code>ExportServiceProvider</code>, <code>ImportServiceProvider</code>, <code>ChunkServiceProvider</code>) register services</li>
<li>All dependencies resolved through container, eliminating direct instantiation</li>
<li>Full support for interface-based dependency injection</li>
</ul>
<h4>Request Handlers</h4>
<ul>
<li><code>ExportRequestHandler</code> – handles export requests</li>
<li><code>ImportRequestHandler</code> – delegates to specialized import services (supports unified import via <code>UnifiedImportOrchestrator</code>)</li>
<li><code>UserMergeRequestHandler</code> – processes user merge operations</li>
<li><code>ThemePreviewRequestHandler</code> – handles theme preview cancel operations</li>
<li><code>ChunkRestController</code> – REST API controller for chunked upload/download operations</li>
<li>All handlers implement corresponding interfaces for testability</li>
</ul>
<h4>Service Layer</h4>
<ul>
<li><code>SelectedContentImportService</code> – handles selected content imports</li>
<li><code>FullSiteImportService</code> – manages full site imports</li>
<li><code>ThemeImportService</code> – handles theme archive imports</li>
<li><code>UnifiedImportOrchestrator</code> – orchestrates unified import with automatic type detection; step 1 is always preflight, step 2 runs the real import using a stored file reference</li>
<li><code>ImportPreflightService</code> – read-only analysis for unified import preflight</li>
<li><code>PreflightReportStore</code> – short-lived transient storage for preflight reports and follow-up import handles (staged browser uploads under <code>wp-content/uploads/mksddn-mc/preflight/</code>, or chunk/server identifiers)</li>
<li><code>ImportTypeDetector</code> – detects import type (full site or selected content) from archive file</li>
<li><code>ImportFileValidator</code> – validates uploaded files</li>
<li><code>ImportPayloadPreparer</code> – prepares import payloads</li>
<li><code>ServerBackupScanner</code> – scans and validates backup files on the server</li>
<li><code>ResponseHandler</code> – manages redirects and status messages</li>
<li><code>NotificationService</code> – handles user notifications</li>
<li><code>ProgressService</code> – tracks operation progress</li>
<li><code>ErrorHandler</code> – centralized error handling and logging</li>
<li><code>UserDiffBuilder</code> – builds user difference comparison</li>
<li><code>UserMergeApplier</code> – applies user merge operations</li>
<li><code>ThemePreviewStore</code> – stores pending theme import previews</li>
<li><code>DeactivationCleanup</code> – clears temporary upload state and service directories when the plugin is deactivated</li>
<li><code>PostImportMaintenance</code> – centralizes cache/rewrite cleanup after full import and emergency purge if the database was partially updated; performs global flush plus targeted <code>wp_cache_flush_group()</code> when supported, bumps posts/terms/comments last_changed hooks, exposes <code>mksddn_mc_post_import_object_cache_flush_groups</code> filter, integrates page-cache plugins via best-effort function calls and hooks</li>
<li><code>FullImportMaintenance</code> – file-based runtime lock and early 503 gate while a full-site import is running (admin, CLI, cron exempt; REST blocked unless explicitly allowed)</li>
</ul>
<h4>Contracts (Interfaces)</h4>
<p>All key components implement interfaces:<br />
* <code>ExporterInterface</code>, <code>ImporterInterface</code><br />
* <code>MediaCollectorInterface</code>, <code>ChunkJobRepositoryInterface</code><br />
* <code>UserPreviewStoreInterface</code>, <code>ThemePreviewStoreInterface</code>, <code>UserDiffBuilderInterface</code>, <code>UserMergeApplierInterface</code><br />
* <code>NotificationServiceInterface</code>, <code>ProgressServiceInterface</code><br />
* <code>ArchiveHandlerInterface</code>, <code>ValidatorInterface</code><br />
* Request handler interfaces for all handlers</p>
<h4>Error Handling</h4>
<ul>
<li>Specialized exceptions: <code>ValidationException</code>, <code>FileOperationException</code>, <code>DatabaseOperationException</code>, <code>ImportException</code>, <code>ExportException</code></li>
<li>Centralized <code>ErrorHandler</code> for consistent error processing</li>
<li>Proper logging and user-friendly error messages</li>
<li>Validation classes: <code>ArchiveValidator</code>, <code>ImportDataValidator</code>, <code>ExportDataValidator</code>, <code>FileValidator</code></li>
</ul>
<h4>Performance</h4>
<ul>
<li><code>BatchLoader</code> for optimized database queries (prevents N+1 problems)</li>
<li>Efficient media collection with batch processing (<code>AttachmentCollector</code>)</li>
<li>Chunked transfer for large files via REST API (<code>ChunkRestController</code>)</li>
<li>Memory-efficient streaming for large archives</li>
<li><code>FullArchivePayload</code> for efficient archive payload handling</li>
<li><code>ContentCollector</code> for filesystem content collection</li>
</ul>
<h4>Security</h4>
<ul>
<li>All admin operations check <code>current_user_can('manage_options')</code></li>
<li>Nonce verification for all forms and AJAX requests</li>
<li>REST API endpoints protected with permission callbacks</li>
<li>Input sanitization using WordPress sanitization functions</li>
<li>Output escaping with <code>esc_html()</code>, <code>esc_attr()</code>, <code>esc_url()</code></li>
<li>File upload validation with MIME type checking</li>
<li>Path traversal protection for server file access (<code>ServerBackupScanner</code>)</li>
<li>Path traversal protection for archive extraction (full site + theme import)</li>
<li><code>SiteUrlGuard</code> prevents accidental site URL changes during import</li>
<li><code>ImportLock</code> prevents concurrent import operations</li>
<li><code>DomainReplacer</code> safely handles URL replacement during migrations</li>
</ul>


MksDdn Migrate Content

Reliable chunked migrations powered by custom .wpbkp archives.

SM Easy Post Migrator vs MksDdn Migrate Content