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LMN Site Monitor

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LMN Site Monitor

by Francisco Moreno

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Description

LMN Site Monitor is a lightweight WordPress monitoring plugin that keeps track of your websites and alerts you when something goes wrong. Monitor uptime, SSL certificate expiration, and response time directly from your WordPress dashboard — no external SaaS required.

Main Key features

  • Uptime monitoring (HTTP/HTTPS) with configurable intervals.
  • SSL certificate expiration checks with full SNI support.
  • Response latency tracking.
  • Instant HTML email alerts (with automatic dark mode support).
  • Dashboard widget with customizable monitor limits.
  • CSV export of monitoring results.
  • Fully translatable and optimized for modern PHP environments.

LMN Site Monitor is designed to be fast, accessible, and WordPress-native — giving you essential monitoring tools without unnecessary complexity. Learn more at LMN Site Monitor official page: https://lumina.fmkr.net/site-monitor/

Localization

This plugin is fully translatable and currently includes base translations for:

  • English (en_US)
  • Spanish (es_ES)
  • Catalan (ca)
  • French (fr_FR)

If you would like to contribute a new translation, you can do so via WordPress.org’s translation platform.

Version: 2026-03-03 — v0.7.0

  • NEW: Cards are now wider, displaying more information at a glance.
  • NEW: Bulk actions now include sorting options: alphabetical (AZ) and by date added.
  • NEW: Drag-and-drop card reordering with persistent storage between sessions.
  • NEW: Pin system — pin any site to keep it fixed at the top, excluded from sorting.
  • NEW: WHOIS / DNS lookup button on each card: shows IP, DNS provider, NS, MX records, TTL and SSL expiry. Native PHP only, no external APIs or API keys required.
  • NEW: JetBrains Mono font integrated for monospace elements, self-hosted (GDPR-safe, no external CDN).
  • IMPROVE: Full PHPCS / WPCS compliance — zero warnings. Proper nonce and capability checks, sanitization and escaping throughout.
  • IMPROVE: All new strings are fully translatable and i18n-compatible.
  • IMPROVE: Responsive design preserved and refined across all screen sizes.
  • FIX: Removed duplicate wp_mail_failed hook and unified error handlers.
  • FIX: Native WP cron schedules (hourly, daily) are no longer overwritten.
  • FIX: Added file_exists() check before reading changelog.txt.
  • FIX: Added missing wp_unslash() in widget preferences handler.
  • FIX: SSL badge severity now syncs with the user-configured expiry threshold.
  • FIX: PHPCS MissingTranslatorsComment resolved in alert email builders.
  • IMPROVE: Removed dead load_textdomain() method.
  • IMPROVE: Fixed inconsistent indentation in ajax_save_order.

Version: 2025-10-31 — v0.6.5

  • NEW: Full internationalization (en_US, es_ES, ca, fr_FR).
  • NEW: Added Catalan (ca) and French (fr_FR) translations.
  • IMPROVE: Hybrid textdomain loader – automatically loads WP.org language packs and falls back to /languages for ZIP installs.
  • FIX: Added translators comments for all placeholders to comply with WordPress I18n standards.
  • FIX: Escaped all dynamic outputs in admin interface and header tips.
  • MAINT: Removed deprecated load_plugin_textdomain() function per Plugin Check recommendations.

Version: 2025-10-25 — v0.6.4

– Full sanitization and 0 warnings
– All PHPCS/WPCS warnings removed.
– Full sanitization and reordered nonce verification.
– PHP 8.3+ and WordPress 6.8.3+ compatibility.

Version: 2025-10-16 — v0.6.3

UI:
– FIX: Unique IDs in forms (nonces and submit buttons).
– FIX: Console warnings removed for duplicated #_wpnonce and #submit IDs.
– IMPROVE: Accessibility and DOM structure of the admin panel.

Maintenance:
– Version bumped to v0.6.3.

Version: 2025-10-15 — v0.6.2

UI:
– IMPROVE: Unified blue header (h2.hndle) with v0.6.2 badge.
– ADD: Lightweight Markdown rendering (titles, lists, bold, code, separators).
– KEEP: Consistent padding and structure (.postbox.lm-card > h2.hndle + .inside).

Maintenance:
– Version bumped to v0.6.2.

Version: 2025-10-15 — v0.6.1

UI:
– NEW: “Changelog” tab with direct reading of changelog.txt.
– IMPROVE: Body with padding, clean background, and better typographic rhythm.
– IMPROVE: Lightweight Markdown rendering: bold, code, titles (# ## ###), and highlighted list prefixes (NEW, FIX, IMPROVE…).

Maintenance:
– Version bumped to v0.6.1.

Version: 2025-10-14

Functional:
– SMTP operational: form aligned with real keys (smtp_*) and authentication.
– Keeps SMTP password when saved empty (not overwritten).
– Compatibility with Gmail (app passwords) and Office 365.

UI:
– Listing replaced by responsive card grid (auto-fit/minmax).
– “OK” status (green/white text) and “Down” (red/white text).
– Down sites with red border + soft pulse (respects reduced motion).
– Inline styles cleaned moved to assets/admin-theme.css.

Maintenance:
– Nonces and handlers verified; no changes in cron or check logic.
– CSV import/export and bulk actions unchanged.

Version: 2025-10-07 — v0.6.0

  • NEW: CSV import using the same format as export (adds URLs without removing existing ones).
  • NEW: Bulk actions in list (Delete selected) using standard WordPress handlers.
  • IMPROVE: Listing UI: master checkbox, batch action bar, and confirmations.
  • IMPROVE: Error handling and post-action messages for imports or batch actions.

Version: 2025-10-06 — v0.5.3

  • NEW: CSV export from the “About Site Monitor” section.
  • NEW: “About Site Monitor” section with quick metrics and cron status.
  • IMPROVE: Minor cleanup in headers and constants (VERSION).

Version: 2025-10-06 — v0.5.2

  • NEW: “About Site Monitor” box in the right column of the admin dashboard.

Version: 2025-10-06 — v0.5.1

  • CHANGE: Default light HTML email + automatic dark mode with prefers-color-scheme.

Version: 2025-10-06 — v0.5.0

  • NEW: HTML alert email with badges, detail table, and action buttons.
  • NEW: Per-user preference in dashboard widget (number of sites displayed).
  • IMPROVE: Classic UI improved (light/dark theme, responsive tables and forms).
  • FIX: Text contrast in dark theme (labels, cells, and descriptions).

Version: 2025-10-05 — v0.4.0

  • NEW: Admin page with listing, quick actions, and settings.
  • NEW: HTTP and SSL expiry checks with email alerts.
  • NEW: Configurable cron (5 min, 15 min, hourly, daily) and “force check” option.

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