YT 404 Logger & Insights

A WordPress plugin that logs 404 errors and provides insights into missing pages, with optional auto-redirect functionality.

Features

• Automatic 404 Logging: Captures all 404 errors including path, referrer, user agent, IP address, and timestamp
• Top Missing Pages: View summary of most frequently accessed missing URLs
• Recent 404 Errors: Browse recent 404 errors with detailed information
• Statistics Dashboard: Quick overview of total errors and unique URLs
• Auto-Redirect Rules: Set up custom redirect rules for commonly missing pages
• AJAX-Powered Management: Delete individual logs or clear all logs without page refresh
• Spam Protection: Prevents duplicate logging within 1-minute intervals
• Secure & WPCS Compliant: Follows WordPress coding standards with proper sanitization and escaping

Installation

1. Upload the yt-404-logger-insights folder to the /wp-content/plugins/ directory
2. Activate the plugin through the 'Plugins' menu in WordPress
3. Go to Tools → 404 Logs to view logged errors
4. Configure auto-redirect rules at Settings → 404 Logger

Usage

Viewing 404 Logs

Navigate to Tools → 404 Logs in your WordPress admin to see:

• Statistics: Total 404 errors and unique URLs
• Top Missing Pages: Most frequently accessed missing pages with hit counts
• Recent 404 Errors: Latest 404 errors with referrer, IP address, and timestamp

Managing Logs

• Delete Single Entry: Click the "Delete" button next to any log entry
• Clear All Logs: Use the "Clear All Logs" button to remove all entries at once

Setting Up Auto-Redirects

1. Go to Settings → 404 Logger
2. Enable "Enable Auto-Redirect" checkbox
3. Add redirect rules in the format: /old-url => /new-url
4. Example:

   /old-blog-post => /new-blog-post
   /products/discontinued-item => /products
   /contact-us => /contact

5. Save changes

When enabled, visitors accessing a 404 URL with a matching redirect rule will be automatically redirected (301) to the specified page.

Database

The plugin creates a custom table wp_yt_404_logs with the following structure:

• id: Unique log entry ID
• path: The 404 URL path
• referer: HTTP referrer (where the visitor came from)
• user_agent: Browser user agent string
• ip_address: Visitor's IP address
• logged_at: Timestamp when error occurred

File Structure

yt-404-logger-insights/
├── class-yt-404-logger-insights.php  # Main plugin file (~500 lines)
├── assets/
│   ├── css/
│   │   └── yt-404-logger-admin.css   # Admin page styles
│   └── js/
│       └── yt-404-logger-admin.js    # Admin AJAX functionality
└── README.md                          # This file

Prefix Convention

All functions, classes, and database elements use the yt_404_logger prefix:

• Class: YT_404_Logger_Insights
• Constants: YT_404_LOGGER_*
• Functions: yt_404_logger_*
• Options: yt_404_logger_options
• Database: wp_yt_404_logs
• Text Domain: yt-404-logger-insights

Security Features

• Capability checks (manage_options)
• Nonce verification for AJAX requests
• Input sanitization (sanitize_text_field, sanitize_textarea_field)
• Output escaping (esc_html, esc_url, esc_attr)
• Prepared SQL statements (via $wpdb->prepare())
• IP address validation
• Spam protection (rate limiting)

Browser Support

The plugin uses standard WordPress admin UI components and jQuery for compatibility with all modern browsers.

Uninstallation

When the plugin is deleted via WordPress admin:

1. All plugin options are removed
2. The custom database table is dropped
3. WordPress cache is flushed

No data is left behind after uninstallation.

Requirements

• WordPress 5.8 or higher
• PHP 7.4 or higher
• MySQL 5.6 or higher

Complexity

• Total Lines: ~500 lines (PHP)
• Single File Architecture: Main plugin in one PHP file
• Additional Assets: 1 CSS file (~100 lines) + 1 JS file (~100 lines)

License

GPL v2 or later

Author

Krasen Slavov

• Website: https://krasenslavov.com
• GitHub: https://github.com/krasenslavov

Support

For issues and feature requests, please visit the GitHub repository.