feat: add Excimer auto-sampling profiler with flamegraph dashboard

.github/workflows/test-phpstan.yml

@@ -44,7 +44,7 @@ jobs:
         with:
           php-version: ${{ matrix.php-versions }}
           tools: phpstan
-          extensions: intl
+          extensions: intl, json, mbstring, xml, excimer
           coverage: none
         env:
           COMPOSER_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/test-phpunit.yml

@@ -43,7 +43,7 @@ jobs:
         with:
           php-version: ${{ matrix.php-versions }}
           tools: composer, phpunit
-          extensions: intl
+          extensions: intl, json, mbstring, xml, excimer
           coverage: xdebug
         env:
           COMPOSER_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/test-rector.yml

@@ -40,7 +40,7 @@ jobs:
         with:
           php-version: ${{ matrix.php-versions }}
           tools: phpstan
-          extensions: intl, json, mbstring, xml
+          extensions: intl, json, mbstring, xml, excimer
           coverage: none
         env:
           COMPOSER_TOKEN: ${{ secrets.GITHUB_TOKEN }}

README.md

@@ -1,2 +1,174 @@
 # php-profiler
-PHP Profiling with Excimer
+
+PHP Sampling Profiler using the [Excimer](https://www.mediawiki.org/wiki/Excimer) extension, with automatic per-request collection and a built-in flamegraph dashboard.
+
+---
+
+## Features
+
+- **Zero-code instrumentation** – add one line to `php.ini` and every request is profiled automatically.
+- **Flamegraph dashboard** – interactive SVG flamegraph with zoom, tooltips, and frame highlighting.
+- **Endpoint ranking** – requests grouped by URI path, sorted by total sample count.
+- **Merged view** – all requests for the same endpoint are merged into a single flamegraph.
+- **Export JSON** – download the merged folded-stacks profile for offline analysis.
+- **Automatic cleanup** – keeps the newest 10 000 profiles; older files are pruned on each request.
+
+---
+
+## Requirements
+
+| Requirement | Version |
+|---|---|
+| PHP | ≥ 8.3 |
+| [ext-excimer](https://pecl.php.net/package/excimer) | any |
+
+---
+
+## Installation
+
+```bash
+composer require phpdevsr/php-profiler
+```
+
+Or clone / install directly to `/opt/php-profiler`:
+
+```bash
+git clone https://github.com/PHPDevsr/php-profiler /opt/php-profiler
+```
+
+---
+
+## Quick-start
+
+### 1 – Enable auto-profiling in `php.ini`
+
+```ini
+auto_prepend_file = /opt/php-profiler/profiler.php
+```
+
+Optionally override the data directory:
+
+```ini
+; defaults to /opt/php-profiler/data
+auto_prepend_file = /opt/php-profiler/profiler.php
+```
+
+Or via an environment variable:
+
+```bash
+PHP_PROFILER_DATA_DIR=/var/lib/php-profiler/data
+```
+
+### 2 – Expose the dashboard (Nginx example)
+
+```nginx
+# Serve the dashboard at /profiler/
+location /profiler/ {
+    alias /opt/php-profiler/dashboard/;
+
+    # Restrict to localhost only
+    allow 127.0.0.1;
+    deny  all;
+
+    index index.php;
+    try_files $uri $uri/ /profiler/index.php?$query_string;
+
+    location ~ \.php$ {
+        fastcgi_pass unix:/run/php/php8.3-fpm.sock;
+        fastcgi_index index.php;
+        include fastcgi_params;
+        fastcgi_param SCRIPT_FILENAME $request_filename;
+    }
+}
+```
+
+Apache example:
+
+```apache
+Alias /profiler /opt/php-profiler/dashboard
+
+<Directory /opt/php-profiler/dashboard>
+    Options -Indexes
+    AllowOverride None
+    Require ip 127.0.0.1
+    DirectoryIndex index.php
+</Directory>
+```
+
+### 3 – Open the dashboard
+
+```
+http://127.0.0.1/profiler/
+```
+
+Make a few HTTP requests to your application, then refresh the dashboard to see endpoint rankings and flamegraphs.
+
+---
+
+## Library API
+
+You can also use the `Profiler` class directly in your code:
+
+```php
+use PHPDevsr\Profiler\Profiler;
+
+$profiler = new Profiler(period: 0.01); // 10 ms sampling interval
+
+$profiler->start();
+// … code to profile …
+$profiler->stop();
+
+// Raw folded-stacks string (Excimer format, compatible with flamegraph tools)
+$folded = $profiler->getFoldedStacks();
+
+// Parsed log: array of ['stack' => string[], 'count' => int]
+$log = $profiler->getLog();
+```
+
+### FileStorage
+
+```php
+use PHPDevsr\Profiler\Storage\FileStorage;
+
+$storage = new FileStorage('/var/lib/php-profiler/data');
+
+$storage->save([
+    'id'            => uniqid('', true),
+    'timestamp'     => microtime(true),
+    'endpoint'      => '/api/users',
+    'method'        => 'GET',
+    'duration_ms'   => 45.2,
+    'sample_count'  => 12,
+    'folded_stacks' => $profiler->getFoldedStacks(),
+]);
+
+// Endpoint statistics (sorted by total samples, descending)
+$stats = $storage->getEndpointStats();
+
+// Profiles for one endpoint
+$profiles = $storage->findByEndpoint('/api/users');
+
+// Delete oldest files when total exceeds $maxFiles
+$storage->cleanup(maxFiles: 10_000);
+```
+
+---
+
+## Development
+
+```bash
+# Run tests
+composer test
+
+# Static analysis
+composer phpstan
+
+# Rector dry-run
+composer rector
+```
+
+---
+
+## License
+
+MIT — see [LICENSE](LICENSE).

composer.json

@@ -19,7 +19,8 @@
     ],
     "homepage": "https://github.com/PHPDevsr/php-profiler",
     "require": {
-        "php": "^8.3 || ^8.4 || ^8.5"
+        "php": "^8.3 || ^8.4 || ^8.5",
+        "ext-excimer": "*"
     },
     "require-dev": {
         "nexusphp/tachycardia": "^2.4",