lukmeyer

<p>LukStack Uptime Monitor is a lightweight yet powerful website monitoring solution built for agencies, freelancers, and web professionals who manage multiple websites.</p>
<p>Track uptime, response times, and SSL certificate expiration for all your client sites from a single WordPress dashboard. When something goes wrong, you will know immediately through email notifications or webhook integrations with Slack, Discord, and other services.</p>
<h4>Reliable Monitoring Out of the Box</h4>
<p>Unlike plugins that rely on WordPress Cron (which only runs when someone visits your site), LukStack Uptime Monitor includes a <strong>built-in remote cron server</strong> operated by the plugin author and hosted on AWS in the EU (Frankfurt) region. Your site is automatically registered on plugin activation and the server triggers your monitoring checks every minute — reliably, even on low-traffic sites. Aggregate environment data (WordPress/PHP versions, locale, site count) is transmitted to keep the service compatible; no admin emails, user accounts, or visitor data are sent. See the Privacy section for the full field list. No third-party cron services like cron-job.org or UptimeRobot required.</p>
<h4>Free Plan Features</h4>
<ul>
<li><strong>Uptime Monitoring</strong> – Automatic checks every 15 minutes</li>
<li><strong>Monitor up to 2 websites</strong></li>
<li><strong>Webhook Support</strong> – Native integration with Slack, Discord, Microsoft Teams, and generic webhooks</li>
<li><strong>Manual Checks</strong> – Test any site instantly with one click</li>
<li><strong>Dashboard Widget</strong> – Quick status overview right on your WordPress dashboard</li>
</ul>
<h4>Pro Plan Features</h4>
<ul>
<li><strong>Everything in Free</strong></li>
<li><strong>Monitor up to 100 websites</strong></li>
<li><strong>5 minute check interval</strong> for faster downtime detection</li>
<li><strong>SSL Certificate Monitoring</strong> – Get warned before certificates expire</li>
<li><strong>Website Performance Tracking</strong> – Monitor response times with millisecond precision</li>
</ul>
<h4>Who Is This For?</h4>
<ul>
<li><strong>Web Agencies</strong> managing client websites</li>
<li><strong>Freelancers</strong> maintaining multiple projects</li>
<li><strong>Site Owners</strong> who want peace of mind</li>
<li><strong>DevOps Teams</strong> needing a simple monitoring solution</li>
</ul>
<h4>How It Works</h4>
<ol>
<li>Add a website URL to monitor</li>
<li>LukStack Uptime Monitor checks the site automatically</li>
<li>If the site goes down or returns an error, you get notified</li>
<li>When the site recovers, you get a recovery notification</li>
</ol>
<h4>Webhook Integrations</h4>
<p>LukStack Uptime Monitor automatically formats notifications for popular services:</p>
<ul>
<li><strong>Slack</strong> – Rich message attachments with color-coded severity</li>
<li><strong>Discord</strong> – Embedded messages with status information</li>
<li><strong>Microsoft Teams</strong> – Via generic webhook connector</li>
<li><strong>Zapier / Make</strong> – JSON payload for custom automations</li>
</ul>
<h4>Privacy</h4>
<p>LukStack Uptime Monitor stores the URLs you choose to monitor and their status data. No personal information (admin emails, user accounts, site content) is collected by the plugin itself.</p>
<p>The plugin does transmit data to the following external services:</p>
<ul>
<li><strong>LukStack Cron Server</strong> (operated by the plugin author, hosted on AWS EU Frankfurt) — receives your site URL, a locally generated shared secret, and aggregate environment data (WordPress/PHP versions, locale, site count, multisite flag, Freemius opt-in status) on plugin activation and on each authenticated trigger response, then triggers monitoring checks on your site every minute. Your Freemius user ID is included <strong>only</strong> if you have actively opted in via the Freemius dialog. See the External services section below for the full field list.</li>
<li><strong>Freemius</strong> (license management and opt-in usage tracking) — anonymized data only when you explicitly opt in. See https://freemius.com/privacy/</li>
<li><strong>Webhook URLs</strong> (Slack, Discord, etc.) — only when you configure them and only when a monitored site changes status.</li>
</ul>
<p>All external transmissions are described in detail in the External services section below.</p>
<h3>External services</h3>
<p>This plugin connects to external services as part of its core monitoring functionality. Below is a description of each service, what data is sent, and when.</p>
<h4>Monitored Websites</h4>
<p>LukStack Uptime Monitor sends HTTP requests to the website URLs you add for monitoring. This is the core functionality of the plugin and is required to check uptime and response times. An SSL connection on port 443 is also made to check the SSL certificate expiration date for HTTPS sites (Pro). These requests are sent automatically by the built-in cron server (see below) and when you manually click “Check now”. The data sent is a standard HTTP GET request with a custom user agent header. No personal data is transmitted.</p>
<h4>LukStack Cron Server</h4>
<p>This plugin connects to the LukStack cron server to ensure reliable monitoring checks even when your WordPress site has no visitors. Because no dedicated privacy policy URL is published for this service, the full data-handling details are documented below.</p>
<p><strong>Service operator</strong></p>
<p>Operated by Luk Meyer (plugin author). Contact: via the WordPress.org support forum for this plugin (https://wordpress.org/support/plugin/lukstack-uptime-monitor/).</p>
<p><strong>Hosting and location</strong></p>
<p>Hosted on Amazon Web Services (AWS), region eu-central-1 (Frankfurt, Germany). Data does not leave the EU. The service uses AWS Lambda, AWS DynamoDB, and AWS EventBridge Scheduler. AWS acts as a data processor under a standard data processing agreement.</p>
<p>Server endpoint: https://gt5zheubf8.execute-api.eu-central-1.amazonaws.com</p>
<p><strong>What data is transmitted FROM your site TO the cron server</strong></p>
<p>On plugin activation and when an admin visits the WordPress admin (throttled with exponential backoff):</p>
<ul>
<li>Your site URL (value of WordPress home_url())</li>
<li>A 48-character shared secret, randomly generated on your site, stored in your own wp_options table. This secret is used only to authenticate incoming trigger requests. It is not a WordPress password or account credential.</li>
<li>The plugin version (e.g. “2.4.0”)</li>
<li>Aggregate environment fields used to understand which WordPress/PHP combinations are in use: WordPress version, PHP version, site locale (e.g. “en_US”), multisite flag, and the number of websites you have added to monitoring.</li>
<li>A coarse Freemius opt-in status label: one of “paying”, “trial”, “pending”, “registered”, “anonymous”, or “unknown”. This lets the operator distinguish anonymous from opted-in installs in aggregate metrics.</li>
<li>Your Freemius user ID (numeric) — <strong>only</strong> if you have actively opted in via the Freemius dialog. Anonymous installs never transmit this field.</li>
<li>The same payload is included in the response of each authenticated trigger request, so the operator sees up-to-date environment data over time.</li>
</ul>
<p>No admin email, no user account email, no site content, no visitor data, and no credentials are transmitted. Sites running on <code>localhost</code>, <code>127.0.0.1</code>, or reserved TLDs (<code>.local</code>, <code>.test</code>, <code>.localhost</code>, <code>.example</code>, <code>.invalid</code>) are excluded from registration entirely.</p>
<p><strong>What data is transmitted FROM the cron server TO your site</strong></p>
<p>Every minute, the cron server sends an HTTP POST request to the REST endpoint /wp-json/lukstack/v1/trigger on your site, authenticated via the X-LukStack-Secret header. The request body is empty. The sole purpose of this request is to trigger the plugin’s internal monitoring logic.</p>
<p><strong>What data is stored on the cron server</strong></p>
<ul>
<li>Site URL</li>
<li>Shared secret (needed to authenticate triggers — transmitted over HTTPS only)</li>
<li>A SHA-256 hash of the site URL used as record key</li>
<li>Plan type (Free or Pro) — used to gate trigger frequency server-side</li>
<li>Plugin version, WordPress version, PHP version, site locale (e.g. “en_US”), multisite flag, and the number of monitored sites — used to understand environment compatibility and prioritize fixes</li>
<li>Freemius opt-in status label (“paying”, “trial”, “pending”, “registered”, “anonymous”, “unknown”) — used to distinguish opted-in installs from anonymous in aggregate metrics</li>
<li>Your Freemius user ID — <strong>only</strong> if you have actively opted in via the Freemius dialog</li>
<li>Timestamps: registration time, last successful trigger, last failed trigger, consecutive failure counter</li>
<li>Last error message if any</li>
</ul>
<p>No logs of monitored sites, no uptime data, no visitor data, no admin emails, no user account emails, no site content.</p>
<p><strong>Data retention</strong></p>
<p>Data is kept only as long as the plugin is installed on your site. When the plugin is uninstalled, the plugin best-effort calls a <code>/v1/deregister</code> endpoint on the cron server with your site URL and secret, after which the record is removed. If the deregister call fails (e.g. network error or transient backend issue), the site is additionally marked inactive on the cron server after approximately 100 consecutive failed trigger attempts (about 100 minutes) and no further requests are sent. Inactive records may be purged periodically.</p>
<p><strong>Your rights and how to exercise them</strong></p>
<p>You can at any time:</p>
<ul>
<li>Disable the remote cron by deactivating the plugin — triggers stop, but the record remains on the server until auto-expiry. To remove the record immediately, fully uninstall the plugin: the plugin sends a deregister call on uninstall.</li>
<li>Request deletion of your site’s record by posting in the plugin’s WordPress.org support forum with your site URL (or a hash of it). Records are typically deleted within 7 days of a confirmed request.</li>
<li>Rotate the shared secret by re-registering (the settings page exposes a “Force re-register now” button when WP_DEBUG is enabled in your wp-config.php).</li>
</ul>
<p><strong>Security</strong></p>
<ul>
<li>All transmissions are over HTTPS (TLS).</li>
<li>Incoming triggers to your site are validated using hash_equals() (constant-time comparison) to prevent timing attacks.</li>
<li>The shared secret is stored with autoload disabled and is not exposed in the admin UI unless WP_DEBUG is enabled.</li>
</ul>
<p><strong>Legal basis (GDPR)</strong></p>
<p>The processing described above is necessary for the performance of the service you enabled by installing this plugin (Art. 6 (1) (b) GDPR). The data processed consists of technical identifiers (URL, secret, timestamps), aggregate environment metadata (versions, locale, site count, multisite flag, opt-in status), and — only when you opt in via Freemius — your Freemius user ID. No special categories of personal data (Art. 9 GDPR) are involved.</p>
<h4>Freemius</h4>
<p>This plugin uses Freemius SDK for license management, usage tracking (opt-in only), and the upgrade flow. When a user opts in, anonymized data such as the site URL, WordPress version, PHP version, and plugin version may be sent to Freemius servers. Users can opt out at any time.</p>
<p>This service is provided by Freemius, Inc.<br />
Terms of Service: https://freemius.com/terms/<br />
Privacy Policy: https://freemius.com/privacy/</p>
<h4>Slack (optional)</h4>
<p>If you configure a Slack webhook URL in the plugin settings, LukStack Uptime Monitor sends POST requests to the Slack Incoming Webhooks API when a monitored site changes status (goes down, recovers, or has SSL issues). The data sent includes the website URL, its status, response time, and a timestamp. No personal data is transmitted.</p>
<p>This service is provided by Slack Technologies, LLC / Salesforce, Inc.<br />
Terms of Service: https://slack.com/terms-of-service<br />
Privacy Policy: https://slack.com/privacy-policy</p>
<h4>Discord (optional)</h4>
<p>If you configure a Discord webhook URL in the plugin settings, LukStack Uptime Monitor sends POST requests to the Discord Webhooks API when a monitored site changes status. The data sent includes the website URL, its status, response time, and a timestamp. No personal data is transmitted.</p>
<p>This service is provided by Discord, Inc.<br />
Terms of Service: https://discord.com/terms<br />
Privacy Policy: https://discord.com/privacy</p>
<h4>Generic Webhooks (optional)</h4>
<p>You may configure any third-party webhook URL (e.g. Microsoft Teams, Zapier, Make, or a custom endpoint). When a monitored site changes status, a POST request with a JSON payload is sent to that URL. The data sent includes the website URL, its status, response time, and a timestamp. No personal data is transmitted. Please refer to the terms of service and privacy policy of the respective service you configure.</p>
<h3>Additional Information</h3>
<h4>Requirements</h4>
<ul>
<li>WordPress 5.8 or higher</li>
<li>PHP 7.4 or higher</li>
<li>PHP extensions: curl, openssl, json</li>
</ul>
<h4>Support</h4>
<p>For support questions, please use the WordPress.org support forum for this plugin.</p>
<h4>Credits</h4>
<p>Developed by Luk Meyer.</p>


LukStack Uptime Monitor

Monitor multiple websites for uptime, performance, and SSL certificate expiration. Built-in remote cron for reliable checks — no third-party services  …

Francisco Moreno

<p><strong>LMN Site Monitor</strong> 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.</p>
<p><strong>Key features</strong></p>
<ul>
<li>Uptime monitoring (HTTP/HTTPS) with configurable intervals.</li>
<li>SSL certificate expiration checks with full SNI support.</li>
<li>Domain expiry notifications.</li>
<li><strong>Malware scanning</strong> powered by Google Safe Browsing API and URLhaus (abuse.ch); per-site scheduled scans (never / daily / weekly); downloadable PDF security report.</li>
<li>Response latency tracking with full history stored in a dedicated database table.</li>
<li>Performance charts (bar, line, 3D bar, heatmap) powered by self-hosted Apache ECharts 5 — no external CDN, GDPR-safe.</li>
<li>Statistics modal with per-site avg / min / max response time and uptime %; CSV and PDF export.</li>
<li>Automatic retry after downtime to avoid false positives.</li>
<li>Instant HTML email alerts (with automatic dark mode support).</li>
<li>Dashboard widget with customizable monitor limits.</li>
<li>CSV export/import of monitored sites.</li>
<li>Fully translatable (16 languages) and optimized for modern PHP environments.</li>
</ul>
<p>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: <a href="https://lumina.fmkr.net/site-monitor/" rel="nofollow ugc">https://lumina.fmkr.net/site-monitor/</a></p>
<h3>Localization</h3>
<p>This plugin is fully translatable and currently includes base translations for:</p>
<ul>
<li>English (en_US)</li>
<li>Spanish (es_ES)</li>
<li>Catalan (ca)</li>
<li>French (fr_FR)</li>
<li>Arabic (ar)</li>
<li>Galician (gl_ES)</li>
<li>German (de_DE)</li>
<li>Basque (eu)</li>
<li>Italian (it_IT)</li>
<li>Japanese (ja)</li>
<li>Korean (ko_KR)</li>
<li>Dutch (nl_NL)</li>
<li>Portuguese (pt_PT)</li>
<li>Turkish (tr_TR)</li>
<li>Ukrainian (uk)</li>
<li>Simplified Chinese (zh_CN)</li>
</ul>
<p>If you would like to contribute a new translation, you can do so via WordPress.org’s translation platform.</p>
<h3></h3>
<p>Version: 2026-05-26 — v1.0.0</p>
<ul>
<li>COMPAT: WordPress 7.0 full compatibility — tested and confirmed against WP 7.0 core changes (Modern theme, PHPMailer 7.0.2, PHP 7.4 minimum).</li>
<li>IMPROVE: CSS scoping fix — postbox header rule (.hndle) now correctly scoped to .lm-scope, preventing style leakage to other dashboard widgets on index.php.</li>
<li>NEW: Apache ECharts 5.6.0 + echarts-gl 2.0.8 bundled locally in /assets/ (no external CDN, GDPR-safe); Chart.js replaced as charting engine.</li>
<li>NEW: 3D bar chart of response times per site via echarts-gl (WebGL).</li>
<li>NEW: GitHub-style activity heatmap (checks per day/hour) powered by ECharts heatmap series.</li>
<li>NEW: Toggle in the charts UI to switch between 2D and 3D view.</li>
<li>IMPROVE: Dark mode for charts uses ECharts native ‘dark’ theme — no extra CSS required.</li>
<li>IMPROVE: Chart.js and date-fns adapter removed from plugin bundle; replaced by ECharts 5.6.0 (self-hosted, Apache 2.0 licence).</li>
</ul>
<h3></h3>
<p>Version: 2026-05-16 — v0.9.4</p>
<ul>
<li>NEW: Site thumbnail — each card now shows a screenshot preview via Automattic mshots (s0.wordpress.com/mshots/v1/). No API key required; images load lazily with CDN caching and dark-mode brightness filter.</li>
<li>NEW: Telegram Bot alerts — new accordion in Settings <span aria-hidden="true" class="wp-exclude-emoji">→</span> Alerts: Bot Token + Chat ID. Formatted HTML messages sent for all alert types (site down, recovery, SSL expiry, domain expiry). Works alongside email and Discord.</li>
<li>NEW: Discord Webhook alerts — new accordion in Settings <span aria-hidden="true" class="wp-exclude-emoji">→</span> Alerts: Webhook URL. Alerts delivered as color-coded embeds (red = down, orange = warning, green = recovery).</li>
<li>SECURITY: Full secrets encryption — SMTP password, Telegram token, Discord URL, Google Safe Browsing key, and URLhaus key are encrypted with AES-256-CBC using AUTH_KEY + SECURE_AUTH_SALT before storage. Settings forms never return secret values to the browser.</li>
<li>IMPROVE: i18n complete — 51 previously untranslated PHP strings added to the .pot template and fully translated across all 16 supported languages; all .po and .mo files recompiled. A pre-existing untranslated string (Google Safe Browsing optional key notice) also filled in for 7 languages.</li>
<li>FIX: Closing the security scan modal no longer causes a flash from dark to light mode; page reload removed, scan results update in-place.</li>
<li>FIX: Scan status label (“No incidents” / “Incidents detected”) now appears on the card immediately after scanning, without requiring a manual page reload.</li>
<li>FIX: Plural-form translations in .mo files were corrupted (drag-to-reorder label was appearing in SSL/domain expiry day fields); all 16 .mo files recompiled with correct GNU gettext plural-form encoding.</li>
<li>IMPROVE: Performance charts redesign — neon color palette for bar chart; trend chart shows filled min–max band with adaptive Y axis; distribution chart replaced with animated Polar Area chart; neon glow effect on all chart canvases in dark mode.</li>
</ul>
<h3></h3>
<p>Version: 2026-04-29 — v0.9.3</p>
<ul>
<li>NEW: Animated toast notification system — success / error / warning toasts appear bottom-right, auto-dismiss 3.8 s, click to close, slide-in/out animation. Replaces silent AJAX operations.</li>
<li>IMPROVE: “Force” and “Check all now” buttons change to “Checking…” and disable during server-side check.</li>
<li>IMPROVE: Pin/Unpin actions show a success toast; AJAX errors show an error toast with UI rollback.</li>
<li>IMPROVE: Card reorder now shows “Order saved” toast on server confirmation.</li>
<li>IMPROVE: Site cards lift 2 px on hover with smooth shadow transition; suppressed during drag.</li>
<li>IMPROVE: 5 new i18n strings added; translations for 16 languages pending.</li>
<li>SECURITY: SSRF protection — admin-supplied URLs validated against private/reserved IP ranges before acceptance; only http/https allowed.</li>
<li>SECURITY: error_msg sanitization — HTTP error body snippets sanitized with sanitize_text_field() before storage.</li>
<li>NEW: Unified action bar (top + bottom) — Select all checkbox, bulk actions, Check all now, Scan all, Export CSV, Import CSV consolidated in one strip above and below the cards.</li>
<li>NEW: Scan all — sequential background scan of all monitored sites with live badge updates and completion toast.</li>
<li>IMPROVE: 3 new i18n strings (selectAll, scanAll, scanAllDone) translated in 16 languages.</li>
</ul>
<h3></h3>
<p>Version: 2026-04-02 — v0.9.2</p>
<ul>
<li>FIX: URLhaus (abuse.ch) integration now requires an API key (Auth-Key header); added URLhaus API Key field in Settings <span aria-hidden="true" class="wp-exclude-emoji">→</span> Security scanning. Without a key the URLhaus check is skipped gracefully.</li>
<li>FIX: Scan modal failed to open with “i18n is not defined” JS error — resolved by declaring i18n from cfg.i18n inside initScanModal().</li>
<li>FIX: PDF security report printed blank — modal is now temporarily moved to document.body before window.print() and restored afterwards so @media print selectors work correctly.</li>
<li>FIX: “Scanning…” text rendered as garbled bytes (double-encoded UTF-8) — replaced with an animated indeterminate progress bar.</li>
<li>IMPROVE: Scan badge button removed from card header; scan result (shield icon + date + status label) now appears as an inline row inside the card metadata block, consistent with the rest of the card layout.</li>
<li>FIX: “Scan” button font-size reduced to match the rest of the card action buttons (11 px).</li>
<li>IMPROVE: Status labels renamed to “No incidents” / “Incidents detected” (es_ES: “Sin incidencias” / “Incidencias detectadas”), color-coded green and red respectively; all 16 .po/.mo files updated.</li>
<li>NEW: Help tab with 12 documented sections covering all plugin features: Getting started, Uptime monitoring, SSL & domain expiry, Email alerts, Performance charts & statistics, Malware scanning, WHOIS / DNS lookup, Dashboard widget, CSV export / import, Card management, and step-by-step guides for both API keys (Google Safe Browsing and URLhaus).</li>
<li>IMPROVE: Top toolbar now shows a compact API keys notice with direct links to Google Cloud Console and abuse.ch, replacing the old generic description block.</li>
<li>IMPROVE: 21 new i18n strings added to all 16 supported languages.</li>
</ul>
<h3></h3>
<p>Version: 2026-03-25 — v0.9.1</p>
<ul>
<li>NEW: Malware scanning powered by Google Safe Browsing API (free key required) and URLhaus (abuse.ch, no key required). Scan button on each site card opens a security report modal.</li>
<li>NEW: Per-site automatic scan schedule (Never / Daily / Weekly) with WP Cron integration.</li>
<li>NEW: Security report modal with per-source results, threat types, global status, and one-click PDF download (window.print()).</li>
<li>NEW: Google Safe Browsing API Key field in Settings <span aria-hidden="true" class="wp-exclude-emoji">→</span> Security scanning section.</li>
<li>NEW: 28 new i18n strings added to all 16 supported languages.</li>
</ul>
<h3></h3>
<p>Version: 2026-03-16 — v0.9.1</p>
<ul>
<li>NEW: Performance charts (bar, line, donut) powered by self-hosted Chart.js 4.5.1 (GDPR-safe, no external CDN).</li>
<li>NEW: Response-time history stored in a dedicated database table (<code>lmnsimo_response_log</code>); rolling 500-entry window per site; table removed cleanly on uninstall.</li>
<li>NEW: Statistics modal with per-site total checks, avg / min / max response time and uptime %; accessible from the Monitor tab.</li>
<li>NEW: CSV export and Print/PDF export of the statistics table.</li>
<li>NEW: Period selector (Last 24 h · Last 7 days · Last 30 days) for charts and statistics.</li>
<li>NEW: 25 new strings fully translated across all 16 supported languages; <code>.pot</code> and all <code>.po</code> files updated.</li>
<li>IMPROVE: Charts and statistics modal respect the plugin’s light/dark theme.</li>
</ul>
<h3></h3>
<p>Version: 2026-03-14 — v0.8.1</p>
<ul>
<li>FIX: Fix translation errors.</li>
</ul>
<h3></h3>
<p>Version: 2026-03-14 — v0.8.0</p>
<ul>
<li>NEW: New languages: Arabic, German, Basque, Italian, Japanese, Korean, Dutch, Portuguese, Turkish, Ukrainian, and Simplified Chinese.</li>
<li>NEW: Automatic retry after downtime to avoid false positives.</li>
<li>NEW: Domain expiry notifications.</li>
<li>MAINT: i18n maintained; PHPCS/WPCS compliant.</li>
</ul>
<h3></h3>
<p>Version: 2026-03-03 — v0.7.0</p>
<ul>
<li>NEW: Cards are now wider, displaying more information at a glance.</li>
<li>NEW: Bulk actions now include sorting options: alphabetical (A<span aria-hidden="true" class="wp-exclude-emoji">→</span>Z) and by date added.</li>
<li>NEW: Drag-and-drop card reordering with persistent storage between sessions.</li>
<li>NEW: Pin system — pin any site to keep it fixed at the top, excluded from sorting.</li>
<li>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.</li>
<li>NEW: JetBrains Mono font integrated for monospace elements, self-hosted (GDPR-safe, no external CDN).</li>
<li>IMPROVE: Full PHPCS / WPCS compliance — zero warnings. Proper nonce and capability checks, sanitization and escaping throughout.</li>
<li>IMPROVE: All new strings are fully translatable and i18n-compatible.</li>
<li>IMPROVE: Responsive design preserved and refined across all screen sizes.</li>
<li>FIX: Removed duplicate <code>wp_mail_failed</code> hook and unified error handlers.</li>
<li>FIX: Native WP cron schedules (<code>hourly</code>, <code>daily</code>) are no longer overwritten.</li>
<li>FIX: Added <code>file_exists()</code> check before reading <code>changelog.txt</code>.</li>
<li>FIX: Added missing <code>wp_unslash()</code> in widget preferences handler.</li>
<li>FIX: SSL badge severity now syncs with the user-configured expiry threshold.</li>
<li>FIX: PHPCS <code>MissingTranslatorsComment</code> resolved in alert email builders.</li>
<li>IMPROVE: Removed dead <code>load_textdomain()</code> method.</li>
<li>IMPROVE: Fixed inconsistent indentation in <code>ajax_save_order</code>.</li>
</ul>
<h3></h3>
<p>Version: 2025-10-31 — v0.6.5</p>
<ul>
<li>NEW: Full internationalization (en_US, es_ES, ca, fr_FR).</li>
<li>NEW: Added Catalan (ca) and French (fr_FR) translations.</li>
<li>IMPROVE: Hybrid textdomain loader – automatically loads WP.org language packs and falls back to /languages for ZIP installs.</li>
<li>FIX: Added translators comments for all placeholders to comply with WordPress I18n standards.</li>
<li>FIX: Escaped all dynamic outputs in admin interface and header tips.</li>
<li>MAINT: Removed deprecated load_plugin_textdomain() function per Plugin Check recommendations.</li>
</ul>
<h3></h3>
<p>Version: 2025-10-25 — v0.6.4</p>
<p>– Full sanitization and 0 warnings<br />
– All PHPCS/WPCS warnings removed.<br />
– Full sanitization and reordered nonce verification.<br />
– PHP 8.3+ and WordPress 6.8.3+ compatibility.</p>
<h3></h3>
<p>Version: 2025-10-16 — v0.6.3</p>
<p>UI:<br />
– FIX: Unique IDs in forms (nonces and submit buttons).<br />
– FIX: Console warnings removed for duplicated #_wpnonce and #submit IDs.<br />
– IMPROVE: Accessibility and DOM structure of the admin panel.</p>
<p>Maintenance:<br />
– Version bumped to v0.6.3.</p>
<h3></h3>
<p>Version: 2025-10-15 — v0.6.2</p>
<p>UI:<br />
– IMPROVE: Unified blue header (h2.hndle) with v0.6.2 badge.<br />
– ADD: Lightweight Markdown rendering (titles, lists, <strong>bold</strong>, <code>code</code>, separators).<br />
– KEEP: Consistent padding and structure (.postbox.lm-card > h2.hndle + .inside).</p>
<p>Maintenance:<br />
– Version bumped to v0.6.2.</p>
<h3></h3>
<p>Version: 2025-10-15 — v0.6.1</p>
<p>UI:<br />
– NEW: “Changelog” tab with direct reading of <code>changelog.txt</code>.<br />
– IMPROVE: Body with padding, clean background, and better typographic rhythm.<br />
– IMPROVE: Lightweight Markdown rendering: <strong>bold</strong>, <code>code</code>, titles (# ## ###), and highlighted list prefixes (NEW, FIX, IMPROVE…).</p>
<p>Maintenance:<br />
– Version bumped to v0.6.1.</p>
<h3></h3>
<p>Version: 2025-10-14</p>
<p>Functional:<br />
– SMTP operational: form aligned with real keys (<code>smtp_*</code>) and authentication.<br />
– Keeps SMTP password when saved empty (not overwritten).<br />
– Compatibility with Gmail (app passwords) and Office 365.</p>
<p>UI:<br />
– Listing replaced by responsive card grid (auto-fit/minmax).<br />
– “OK” status (green/white text) and “Down” (red/white text).<br />
– Down sites with red border + soft pulse (respects reduced motion).<br />
– Inline styles cleaned <span aria-hidden="true" class="wp-exclude-emoji">→</span> moved to <code>assets/admin-theme.css</code>.</p>
<p>Maintenance:<br />
– Nonces and handlers verified; no changes in cron or check logic.<br />
– CSV import/export and bulk actions unchanged.</p>
<h3></h3>
<p>Version: 2025-10-07 — v0.6.0</p>
<ul>
<li>NEW: CSV import using the same format as export (adds URLs without removing existing ones).  </li>
<li>NEW: Bulk actions in list (Delete selected) using standard WordPress handlers.  </li>
<li>IMPROVE: Listing UI: master checkbox, batch action bar, and confirmations.  </li>
<li>IMPROVE: Error handling and post-action messages for imports or batch actions.</li>
</ul>
<h3></h3>
<p>Version: 2025-10-06 — v0.5.3</p>
<ul>
<li>NEW: CSV export from the “About Site Monitor” section.  </li>
<li>NEW: “About Site Monitor” section with quick metrics and cron status.  </li>
<li>IMPROVE: Minor cleanup in headers and constants (VERSION).</li>
</ul>
<h3></h3>
<p>Version: 2025-10-06 — v0.5.2</p>
<ul>
<li>NEW: “About Site Monitor” box in the right column of the admin dashboard.</li>
</ul>
<h3></h3>
<p>Version: 2025-10-06 — v0.5.1</p>
<ul>
<li>CHANGE: Default light HTML email + automatic dark mode with <code>prefers-color-scheme</code>.</li>
</ul>
<h3></h3>
<p>Version: 2025-10-06 — v0.5.0</p>
<ul>
<li>NEW: HTML alert email with badges, detail table, and action buttons.  </li>
<li>NEW: Per-user preference in dashboard widget (number of sites displayed).  </li>
<li>IMPROVE: Classic UI improved (light/dark theme, responsive tables and forms).  </li>
<li>FIX: Text contrast in dark theme (labels, cells, and descriptions).</li>
</ul>
<h3></h3>
<p>Version: 2025-10-05 — v0.4.0</p>
<ul>
<li>NEW: Admin page with listing, quick actions, and settings.  </li>
<li>NEW: HTTP and SSL expiry checks with email alerts.  </li>
<li>NEW: Configurable cron (5 min, 15 min, hourly, daily) and “force check” option.</li>
</ul>
<h3></h3>


LMN Site Monitor

A lightweight WordPress uptime and SSL monitoring plugin with email alerts, ECharts performance charts (2D/3D), and dashboard widget.

LukStack Uptime Monitor vs LMN Site Monitor