WPHI Diagnostic Suite Lite

You already know something is wrong. This plugin tells you what, why, and exactly how to fix it.

Most WordPress diagnostic tools show you a list of problems. WPHI Diagnostic Suite goes further: it reads your PHP error log, traces each error back to the plugin that caused it, checks whether a recent update triggered it, and gives you a structured «error map» — plain-English explanation, probable cause, impact level, numbered fix steps, and WP-CLI commands — specific to the actual function or class that failed. It also features a temproary error log, which reports all current errors, and can be cleared for quick debugging and error remediation. This allows for realtime reporting of which errors have been resolved, and which still exist.

It does all of this without touching a single row of your data. Every query is SELECT-only. No cleanups, no automation, no risk.

Who is this for?

✅ Site owners who see «something is wrong» on their dashboard and don’t know where to start.

✅ Developers who need to diagnose a client site quickly without installing Query Monitor on production.

✅ Agencies managing multiple WordPress sites who need a fast, reliable read on site health before and after maintenance.

✅ Anyone who has ever looked at a PHP error log and not known what to do next.

What makes this different

Most diagnostic plugins show you numbers. This one tells you what the numbers mean for your site, right now.

Plugin attribution everywhere. It’s not enough to know you have 12 custom database tables. You need to know which plugin owns each one, how many rows each table has, and what would happen if you deactivated that plugin. The Blast Radius module traces every custom table, every scheduled cron job, and every REST API namespace back to the plugin that created it — using callback Reflection, file scanning, and a curated fingerprint database covering 30+ popular plugins.

Error maps, not error lists. When the Error Log Viewer finds a PHP fatal error, it doesn’t just show you the message and file. It opens a structured «error map» with five sections: what this error class means in plain English, the probable cause based on the actual function or class name extracted from the message, the impact on visitors, numbered fix steps specific to this error type, copyable WP-CLI commands, and a prevention tip. A «Call to undefined function wc_get_cart()» gets different advice than a «Cannot redeclare foo()» — because they’re different problems.

Recommended diagnostic paths based on your live data. The dashboard reads your current error log, autoload size, overdue cron count, and pending update count, then surfaces the two or three diagnostic paths most likely to lead you to the root cause of your current problem — in the right order. No generic checklists. Paths are ordered by how strongly your live data points to each scenario.

Change correlation. The What Changed? module tracks every plugin update, activation, and WordPress core update as a timestamped event. When a PHP error appears, it calculates a 0–99 correlation score between the error and the most likely change that caused it — using file-path matching (the error originates inside the updated plugin’s folder) as the primary signal. You can see at a glance whether last night’s WooCommerce update is responsible for today’s fatal errors.

The Modules

🏥 Health Score Dashboard An animated 0–100 gauge computed from all module findings. Issues are listed with severity labels and direct links to the relevant module. Opens instantly — no page scan required.

🔍 Error Log Viewer Parses your PHP error log and groups identical errors. Each group shows severity, occurrence count, first and last seen timestamps, file path, line number, and a full error map with fix steps and WP-CLI commands. A «What Changed?» button on each card checks whether a recent update correlates with the error’s appearance. Error log search filters live without a page reload and composes correctly with pagination.

📡 What Changed? — Timeline Correlation Tracks plugin updates, activations/deactivations, WordPress core updates, and theme changes as timestamped events. Displays them on an interactive SVG timeline alongside PHP error spikes. Clicking any correlation finding shows the confidence score, the reasoning, and the specific files involved.

🗄️ DB Health Inspector Shows every autoloaded option ranked by size with colour-coded severity. Flags orphaned postmeta rows left by removed plugins, and lists every table exceeding 50 MB. Identifies the exact options driving your autoload overhead.

⚡ Autoload Governor Full per-plugin autoload attribution — know which plugin owns each option. Includes Deep Autoload Diagnostics with five detection passes: orphaned options from removed plugins (80+ plugin fingerprint database), autoloaded transients, duplicate cache clusters, migration remnants from backup tools, and stale WooCommerce sessions. Each finding shows the size in KB and includes a ready-to-run WP-CLI command.

🎯 Blast Radius Analyzer Every custom database table attributed to its owning plugin — with name, version, and approximate row count. Every non-core cron job attributed via callback Reflection and hook-name fingerprinting. Know exactly which plugins have the deepest footprint on your site and what removing them would affect.

🖼️ Asset Inspector Every JavaScript and CSS file WordPress enqueues on the front end, with individual file sizes and running totals. If a plugin loads a 400 KB script on pages where it’s not needed, this is where you find it.

🕐 Cron Inspector Every WP-Cron and Action Scheduler job with its next run time and recurrence interval. Overdue jobs are highlighted — they run on the next page request and spike load for that visitor.

💣 Time Bomb Detector Checks your SSL certificate expiry and warns you 30 days in advance. An expired SSL certificate is a site outage your visitors experience before you do.

🖥️ Server & PHP Environment PHP memory limit, max execution time, upload limits, OPcache status, and server software details. The configuration ceiling that caps everything else your site can do.

📄 Export Report Downloads a self-contained HTML report covering health score, database metrics, error log summary, and system snapshot — useful for sharing findings with a developer or keeping as a pre-maintenance baseline.

Recommended Diagnostic Paths

The dashboard evaluates seven common WordPress problem scenarios against your live site data and surfaces the ones most relevant right now:

• Something broke after an update — What Changed? → Error Log → Blast Radius
• Slow admin panel — Autoload Governor → Cron Inspector → DB Health
• Checkout or payment issues — Error Log → Cron Inspector → Blast Radius
• Random outages — Error Log → Server & PHP → Cron Inspector
• Plugin conflict suspected — Error Log → Blast Radius → Conflict Detector (Pro)
• Database errors — Error Log → DB Health → Blast Radius
• Performance regression — Asset Inspector → Autoload Governor → DB Health

Each path shows specific errors from your log that triggered the recommendation, so you know exactly what you’re chasing before you open the first module.

100% Read-Only. Safe on Any Live Site.

Every query this plugin runs is SELECT, SHOW, or SHOW INDEX. It never writes, updates, or deletes anything. There is no cleanup feature, no auto-fix button, no risk. It was designed from the ground up to be safe on live production sites — because that’s where you need a diagnostic tool most.

Free. No Account. No Expiry. No Ads.

All modules listed above are free forever. No trial period, no nag screens, no email signup, no telemetry, no usage limits.

Upgrade to WP Health Inspector Pro

The Pro plugin runs alongside Lite and unlocks additional modules:

• Pre-Update Impact Analysis — before every update, see the plugin’s Blast Radius Score (0–100): how many hooks it shares with other plugins, which DB tables it owns, how many cron jobs it runs, and a risk rating (Low / Moderate / High / Critical)
• Root Cause Analysis — correlates findings from all modules into plain-language conclusions, with named plugin attribution, WP-CLI commands, and a «Primary Suspect» callout when multiple findings point to the same plugin
• Conflict Detector — which specific plugins are fighting over the same hooks, loading duplicate assets, and providing overlapping functionality — with plugin names, versions, and one-click deactivation links
• Request Profiler — per-request execution timing, memory consumption, database query counts, and hook timeline for deep performance diagnosis
• External Dependencies — outbound HTTP latency monitoring; identifies slow or failing calls to payment gateways, APIs, and CDNs
• Risk Indicators — deprecated function and hook scanner; checks each plugin against the WordPress.org compatibility API
• Performance Baselines — records snapshots over time and flags regressions automatically
• Core Web Vitals — server-side LCP, CLS, and INP estimates with actionable signals
• Complete Server Audit — full php.ini audit, all wp-config.php constants, PHP extension checklist, and database server details

See everything included in Pro →