By default,

  • recursive option is set to false in CompatInfo 2.26, while the Finder recursively traverse directories in version 3.2

  • cacheDriver option is set to file in CompatInfo 2.26, while version 3.2 did not added the cache plugin.

Version 2.26
<?php
require_once 'Bartlett/PHP/CompatInfo/Autoload.php';

$source  = '/path/to/source';
$options = array(
    'cacheDriver' => 'null',
    'recursive'   => true
);

$compatinfo = new PHP_CompatInfo($options);
$compatinfo->parse($source);
Version 3.2
<?php
require_once 'vendor/autoload.php';

use Bartlett\CompatInfo;

use Bartlett\Reflect\ProviderManager;
use Bartlett\Reflect\Provider\SymfonyFinderProvider;

use Symfony\Component\Finder\Finder;

$dirs = '/path/to/source';

$finder = new Finder();
$finder->files()
    ->name('*.php')
    ->in($dirs);

$provider = new SymfonyFinderProvider($finder);

$pm = new ProviderManager;
$pm->set('dataSourceIdent', $provider);

$compatinfo = new CompatInfo;
$compatinfo->setProviderManager($pm);
$compatinfo->parse();
Version 2.26
<?php
require_once 'Bartlett/PHP/CompatInfo/Autoload.php';

$source  = '/path/to/source';
$options = array(
    'cacheDriver' => 'file',
    'recursive'   => true
);

$compatinfo = new PHP_CompatInfo($options);
$compatinfo->parse($source);
It’s not mandatory to specify cacheDriver option what is by default set to false.
Version 3.2
<?php
require_once 'vendor/autoload.php';

use Bartlett\CompatInfo;

use Bartlett\Reflect\ProviderManager;
use Bartlett\Reflect\Provider\SymfonyFinderProvider;
use Bartlett\Reflect\Plugin\Cache\CachePlugin;
use Bartlett\Reflect\Plugin\Cache\DefaultCacheStorage;
use Bartlett\Reflect\Cache\DoctrineCacheAdapter;

use Doctrine\Common\Cache\FilesystemCache;

use Symfony\Component\Finder\Finder;

$dirs = '/path/to/source';

$finder = new Finder();
$finder->files()
    ->name('*.php')
    ->in($dirs);

$provider = new SymfonyFinderProvider($finder);

$pm = new ProviderManager;
$pm->set('dataSourceIdent', $provider);

$backend = new FilesystemCache(sys_get_temp_dir() . '/phpcompatinfo');
$doctrineCache = new DoctrineCacheAdapter($backend);
$cache = new DefaultCacheStorage($doctrineCache);

$compatinfo = new CompatInfo;
$compatinfo->setProviderManager($pm);
$compatinfo->addPlugin( new CachePlugin($cache) );
$compatinfo->parse();
While CompatInfo 2.26 audit all events (does not provide ability to filter them, unless by writing a new listener), version 3.2 let you choose and connect a function by event. See Plugins section of the Developer Guide.
Version 2.26
<?php
require_once 'Bartlett/PHP/CompatInfo/Autoload.php';

$source  = '/path/to/source';
$options = array(
    'cacheDriver' => 'null',
    'recursive'   => true
);

$fileListener = new PHP_CompatInfo_Listener_File();

$compatinfo = new PHP_CompatInfo($options);
$compatinfo->attach($fileListener);
$compatinfo->parse($source);
Version 3.2
<?php
require_once 'vendor/autoload.php';

use Bartlett\CompatInfo;

use Bartlett\Reflect\ProviderManager;
use Bartlett\Reflect\Provider\SymfonyFinderProvider;

use Symfony\Component\Finder\Finder;

$dirs = '/path/to/source';

$finder = new Finder();
$finder->files()
    ->name('*.php')
    ->in($dirs);

$provider = new SymfonyFinderProvider($finder);

$pm = new ProviderManager;
$pm->set('dataSourceIdent', $provider);

$compatinfo = new CompatInfo;
$compatinfo->setProviderManager($pm);

$compatinfo->getEventDispatcher()->addListener(
    'reflect.progress',
    function (GenericEvent $e) {
        printf(
            'Parsing Data source "%s" in progress ... File "%s"' . PHP_EOL,
            $e['source'],
            $e['file']->getPathname()
        );
    }
);
$compatinfo->parse();
Version 2.26
<?php
require_once 'Bartlett/PHP/CompatInfo/Autoload.php';

$source  = '/path/to/source';
$options = array(
    'cacheDriver' => 'null',
    'recursive'   => true
);

$compatinfo = new PHP_CompatInfo($options);
$compatinfo->parse($source);

$versions   = $compatinfo->getVersions();
$classes    = $compatinfo->getClasses();
$functions  = $compatinfo->getFunctions();
$extensions = $compatinfo->getExtensions();
Version 3.2
<?php
require_once 'vendor/autoload.php';

use Bartlett\CompatInfo;
use Bartlett\CompatInfo\Analyser;

use Bartlett\Reflect\ProviderManager;
use Bartlett\Reflect\Provider\SymfonyFinderProvider;
use Bartlett\Reflect\Plugin\Analyser\AnalyserPlugin;

use Symfony\Component\Finder\Finder;

$dirs = '/path/to/source';

$finder = new Finder();
$finder->files()
    ->name('*.php')
    ->in($dirs);

$provider = new SymfonyFinderProvider($finder);

$sourceId = 'dataSourceIdent';

$pm = new ProviderManager;
$pm->set($sourceId, $provider);

$compatinfo = new CompatInfo;
$compatinfo->setProviderManager($pm);
$compatinfo->addPlugin(
    new AnalyserPlugin(
        array(
            new Analyser\SummaryAnalyser(),
        )
    )
);
$compatinfo->parse();

$metrics = $compatinfo->getMetrics();

$versions   = $metrics[$sourceId]['sa.versions'];
$classes    = $metrics[$sourceId]['sa.classes'];
$functions  = $metrics[$sourceId]['sa.functions'];
$extensions = $metrics[$sourceId]['sa.extensions'];
sa. prefix corresponds to class constant METRICS_PREFIX of SummaryAnalyser.