composer/src/Composer/Repository/PlatformRepository.php

<?php

/*
 * This file is part of Composer.
 *
 * (c) Nils Adermann <naderman@naderman.de>
 *     Jordi Boggiano <j.boggiano@seld.be>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Composer\Repository;

use Composer\Package\MemoryPackage;
use Composer\Package\Version\VersionParser;

/**
 * @author Jordi Boggiano <j.boggiano@seld.be>
 */
class PlatformRepository extends ArrayRepository
{
    protected function initialize()
    {
        parent::initialize();

        $versionParser = new VersionParser();

        try {
            $prettyVersion = PHP_VERSION;
            $version = $versionParser->normalize($prettyVersion);
        } catch (\UnexpectedValueException $e) {
            $prettyVersion = preg_replace('#^(.+?)(-.+)?$#', '$1', PHP_VERSION);
            $version = $versionParser->normalize($prettyVersion);
        }

        $php = new MemoryPackage('php', $version, $prettyVersion);
        $php->setDescription('The PHP interpreter');
        parent::addPackage($php);

        $loadedExtensions = get_loaded_extensions();

        // Extensions scanning
        foreach ($loadedExtensions as $name) {
            if (in_array($name, array('standard', 'Core'))) {
                continue;
            }

            $reflExt = new \ReflectionExtension($name);
            try {
                $prettyVersion = $reflExt->getVersion();
                $version = $versionParser->normalize($prettyVersion);
            } catch (\UnexpectedValueException $e) {
                $prettyVersion = '0';
                $version = $versionParser->normalize($prettyVersion);
            }

            $ext = new MemoryPackage('ext-'.$name, $version, $prettyVersion);
            $ext->setDescription('The '.$name.' PHP extension');
            parent::addPackage($ext);
        }

        // Another quick loop, just for possible libraries
        // Doing it this way to know that functions or constants exist before
        // relying on them.
        foreach ($loadedExtensions as $name) {
            switch ($name) {
                case 'curl':
                    $curlVersion = curl_version();
                    $prettyVersion = $curlVersion['version'];
                    break;

                case 'iconv':
                    $prettyVersion = ICONV_VERSION;
                    break;

                case 'libxml':
                    $prettyVersion = LIBXML_DOTTED_VERSION;
                    break;

                case 'openssl':
                    $prettyVersion = preg_replace_callback('{^(?:OpenSSL\s*)?([0-9.]+)([a-z]?).*}', function ($match) {
                        return $match[1] . (empty($match[2]) ? '' : '.'.(ord($match[2]) - 96));
                    }, OPENSSL_VERSION_TEXT);
                    break;

                case 'pcre':
                    $prettyVersion = preg_replace('{^(\S+).*}', '$1', PCRE_VERSION);
                    break;

                case 'uuid':
                    $prettyVersion = phpversion('uuid');
                    break;

                case 'xsl':
                    $prettyVersion = LIBXSLT_DOTTED_VERSION;
                    break;

                default:
                    // None handled extensions have no special cases, skip
                    continue 2;
            }

            try {
                $version = $versionParser->normalize($prettyVersion);
            } catch (\UnexpectedValueException $e) {
                continue;
            }

            $lib = new MemoryPackage('lib-'.$name, $version, $prettyVersion);
            $lib->setDescription('The '.$name.' PHP library');
            parent::addPackage($lib);
        }
    }
}