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Post Meta Checker

Viewer meta modern (AJAX + jQuery) dengan pencarian, read-only untuk meta protected/hidden, edit terbatas, ekspor/impor, admin-only, dan fallback bila REST dibatasi.

by WordPress Developer · github.com/sadewadee/post-meta-checker

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Install

No release zip yet. The repository archive installs, but the folder name will carry the branch suffix and updates will not flow:

wp plugin install https://github.com/sadewadee/post-meta-checker/archive/refs/heads/main.zip

Readme

Post Meta Checker

A modern WordPress plugin for viewing and editing post meta with AJAX-first approach, REST API fallback, and comprehensive security features.

Features

  • AJAX-First Architecture: Primary operations use admin-ajax with REST API as optional enhancement
  • Comprehensive Meta Support: View meta for posts, users, comments, and terms
  • Security-Focused: Admin-only access with proper capability checks and nonce verification
  • Protected Meta Handling: Read-only display for protected/hidden meta (underscore prefix)
  • No Create/Delete: Only allows updating existing meta keys, prevents accidental data creation/loss
  • Modern UI: Clean, responsive interface with search, filtering, and accessibility features
  • Export/Import: JSON-based meta export and import functionality
  • REST Fallback: Automatic detection and fallback when REST API is disabled
  • i18n Ready: Full internationalization support

Requirements

  • WordPress 6.8 or higher
  • PHP 7.4 or higher
  • Administrator capability (manage_options)

Installation

  1. Upload the plugin files to /wp-content/plugins/post-meta-checker/
  2. Activate the plugin through the 'Plugins' menu in WordPress
  3. The meta viewer will appear as a meta box on post edit screens

Usage

Viewing Meta

  • Navigate to any post edit screen (Block Editor or Classic Editor)
  • Scroll down to find the "Post Meta Checker" meta box
  • All meta keys and values will be displayed in a searchable table

Editing Meta

  • Only non-protected meta keys can be edited
  • Protected meta (starting with underscore) is displayed as read-only
  • Changes are saved automatically when you modify values
  • Different input types are provided based on value type (text, number, checkbox, textarea for JSON)

Search and Filtering

  • Use the search box to find specific meta keys or values
  • Toggle "Hide Protected Meta" to hide underscore-prefixed keys
  • Toggle "Only Editable" to show only meta that can be modified

Export/Import

  • Click "Export" to download all meta as a JSON file
  • Click "Import" to upload and restore meta from a JSON file
  • Import only updates existing meta keys, never creates new ones

Security Features

  • Admin-Only Access: Only users with manage_options capability can use the plugin
  • Nonce Verification: All AJAX requests are protected with WordPress nonces
  • Protected Meta: Meta keys starting with underscore are read-only
  • No Meta Creation: Plugin never creates new meta keys, only updates existing ones
  • Sanitization: All input is sanitized using WordPress sanitize_meta() function
  • Capability Checks: Consistent capability checking throughout the plugin

Technical Architecture

AJAX-First Approach

  • Primary data operations use admin-ajax.php endpoints
  • REST API is used optionally for enhanced editability detection
  • Automatic fallback when REST is disabled by security plugins

Meta Box Integration

  • Uses WordPress add_meta_box() for consistent UI placement
  • Compatible with both Block Editor (Gutenberg) and Classic Editor
  • Positioned in "normal" context with "high" priority

File Structure

post-meta-checker/
├── post-meta-checker.php    # Main plugin file
├── assets/
│   ├── admin.css           # Admin styling
│   └── admin.js            # jQuery-based functionality
├── languages/
│   └── morden-post-meta-viewer.pot  # Translation template
├── docs/
│   └── Readme.md           # Detailed documentation
└── README.md               # This file

AJAX Endpoints

  • mmv_get_all_post_meta - Retrieve all post meta
  • mmv_get_all_user_meta - Retrieve all user meta
  • mmv_get_all_comment_meta - Retrieve all comment meta
  • mmv_get_all_term_meta - Retrieve all term meta
  • mmv_update_meta - Update existing meta value
  • mmv_export_meta - Export meta as JSON
  • mmv_import_meta - Import meta from JSON

Settings

Optional settings page available at Settings > Meta Viewer:

  • Force AJAX-only: Disable REST API usage entirely

Compatibility

WordPress Versions

  • Tested with WordPress 6.8+
  • Compatible with Block Editor and Classic Editor
  • Follows WordPress Coding Standards (WPCS)

Security Plugins

  • Automatically detects when REST API is disabled
  • Falls back gracefully to admin-ajax only mode
  • No functionality loss when REST is blocked

Themes and Plugins

  • Uses standard WordPress hooks and APIs
  • No theme dependencies
  • Minimal plugin conflicts due to admin-only scope

Development

Coding Standards

  • Follows WordPress Coding Standards (WPCS)
  • PSR-4 autoloading compatible structure
  • Comprehensive DocBlock documentation

Hooks and Filters

  • Uses standard WordPress action and filter hooks
  • Respects existing meta sanitization filters
  • Compatible with custom meta registration

Testing

  • Manual testing procedures documented
  • Capability and security testing included
  • Cross-browser compatibility verified

Changelog

1.0.0 - 2024-01-01

  • Initial release
  • AJAX-first meta viewer implementation
  • REST API fallback support
  • Export/import functionality
  • Admin-only security model
  • i18n support

License

This plugin is licensed under the GPL-3.0-or-later license.

Support

For support and bug reports, please use the WordPress plugin support forums or contact the plugin author.

Contributing

Contributions are welcome! Please follow WordPress coding standards and include appropriate tests for any new functionality.

Read the full README on GitHub →