src/Composer/Command/HomeCommand.php
private function openBrowser($url)
    {
        $url = ProcessExecutor::escape($url);

        $process = new ProcessExecutor($this->getIO());
        if (Platform::isWindows()) {
            return $process->execute('start "web" explorer "' . $url . '"', $output);
        }

        $linux = $process->execute('which xdg-open', $output);
        $osx = $process->execute('which open', $output);

        if (0 === $linux) {
            $process->execute('xdg-open ' . $url, $output);
        } elseif (0 === $osx) {
            $process->execute('open ' . $url, $output);
        } else {
            $this->getIO()->writeError('No suitable browser opening command found, open yourself: ' . $url);
        }
    }
private function openBrowser($url)
    {
        $url = ProcessExecutor::escape($url);

        $process = new ProcessExecutor($this->getIO());
        if (Platform::isWindows()) {
            return $process->execute('start "web" explorer "' . $url . '"', $output);
        }

        $linux = $process->execute('which xdg-open', $output);
        $osx = $process->execute('which open', $output);

        if (0 === $linux) {
            $process->execute('xdg-open ' . $url, $output);
        } elseif (0 === $osx) {
            $process->execute('open ' . $url, $output);
        } else {
            $this->getIO()->writeError('No suitable browser opening command found, open yourself: ' . $url);
        }
    }
opens a url in your system default browser

@param string $url