Find url from entire website

url-finder

<?php

class urlfinder {

    var $urls = array();
    var $visited = array();
    var $domain;

    public function get ($url, $domain = '') {
        if (in_array($url, $this->visited)) {
            return;
        }
        $this->visited[] = $url;

        if (!empty($domain)) {
            $this->domain = $domain;
        }

        $doc = file_get_contents($url);

        if (!preg_match_all('/<a [^>]*href=["|\']+([^"]+)["|\']+/', $doc, $res)) {
            return;
        }

        foreach ($res[1] as $url) {
            if (!preg_match('/^http[s]*:\/\//', $url)) {
                $url = $this->domain . $url;
            }

            $subdomain = str_replace(array('http://', 'https://'), '', $this->domain);
            if (preg_match('/^http[s]*:\/\/' . $subdomain . '/', $url)) {
                $this->addUrl($url);
                $this->get($url);
            }
        }

        return $this->urls;
    }

    private function addUrl($url) {
        foreach ($this->urls as $id => $values) {
            if ($values['url'] == $url) {
                $this->urls[$id]['count'] = $values['count'] + 1;
                return;
            }
        }

        $this->urls[] = array(
            'url' => $url,
            'count' => 1,
        );

        return;
    }
}