By Composer:

Install composer http://getcomposer.org to your project root;

create composer.json and add something like following:
{
    "require": {
        "virm/search": "dev-master"
    },
    "require-dev": {
        "phpunit/phpunit": "3.7.*"
    },
    "autoload": {
        "psr-0": {"Virm\\Search": ""}
    }
}

run:
    php composer.phar install
    php composer.phar update
for installing dependencies. (symfony dom_crawler, css_selector components)

<?php
    header('Content-Type: text/html; charset=utf-8');
    require_once 'vendor/autoload.php';

    use Virm\Search\Search;
    use Virm\Search\Engine\GoogleEngine;

    $engine = new GoogleEngine('phpunit brutal');
    $search = new Search($engine, 250);

    echo $engine->getCount();

    foreach($search as $k => $result) {
        echo $result->getTitle();
        echo $result->getDescription();
        echo $result->getLink();
    }

    echo $search[23];
?>