A website crawler for the CodeIgniter framework

1. Copy Crawler.php into the library directory of your CodeIgniter application
2. codeigniter_crawler has one requirement, Simple_Html_Dom. Download from http://simplehtmldom.sourceforge.net/ and copy Simple_html_dom.php into the libraries directory of your CodeIgniter application.
3. Load Crawler library from a controller. $this->load->library('crawler');
4. Set a URL. $this->crawler->set_url('http://github.com');
5. Use any of the public methods to obtain data from the URL you just set. $this->crawler->get_text();

• get_text() - Get plain text from the loaded URL.
• get_title() - Get the meta title from the loaded URL.
• get_description() - Get the meta description from the loaded URL.
• get_keywords() - Get the meta keywords from the loaded URL.
• get_links($excluded_terms, $included_terms) - Get all links from the loaded URL.

Crawl github:

function get_site_data($url, $max_depth = 1, $current_depth = 0){
  $current_depth++;

  $this->load->library('crawler');

	$site_data = array();

	if($this->crawler->set_url($site_url) !== false){
		$site_data['title'] = $this->crawler->get_title();
		$site_data['description'] = $this->crawler->get_description();
		$site_data['keywords'] = $this->crawler->get_keywords();
		$site_data['text'] = $this->crawler->get_text();
		$site_data['links'] = $this->crawler->get_links();

		if($current_depth <= $max_depth){
			foreach($site_data['links'] as $link_key => &$link){
				$link['data'] = get_site_data($link, $max_depth, $current_depth);
				}
			}
		}

		return $site_data;
	}
	else{
		return false;
	}
}

$site_data = get_site_data("http://github.com", 1, 0);