MyScrapper.php

<?php
class MyScrapper {
    var $file_scrapped_filename = 'megasena.html';
    var $url = '';

    function __construct($url = false) {
        if (!$url) return false;
        $this->set_url($url);
    }


    /*
        string $url
        return array [scrapped page, filetime]
    */
    public function curl_scrap() {
        if (!isset($this->url))  return false;

        $curl_session = curl_init($this->url);

        // CURLOPT_RETURNTRANSFER this option means that the curl_exec must put the output in a var instead of only printing it.
        curl_setopt($curl_session, CURLOPT_RETURNTRANSFER, true);

        // CURLOPT_FILETIME this option means that the scraping will occour retrieving the modification time of the remote file scrapped
        curl_setopt($curl_session, CURLINFO_FILETIME, true);

        $scraped_page = curl_exec($curl_session);
        if (curl_errno($curl_session))
            //kill the script and throw an error if there is an error in curl_exec;
            die('An error occoured while scraping: '.$this->url.' ERROR::'. curl_error($curl_session)."\n");

        $filetime = curl_getinfo($curl_session, CURLINFO_FILETIME); //unix time or -1 if undef
        curl_close($curl_session);

        return $scraped_page? array(
                    'scraped_page' => $scraped_page,
                    'filetime' => $filetime,
                ):
                false;
    }

    /*
        string $scraped_page
        int filetime

        bool return [true] if the file do exist or [false] if it does not
    */
    public function check_n_save_page($scraped_page, $filetime) {
        if (!$scraped_page)  return false;

        // file time returns unix time, knowing that you can just compare with the [CURLINFO_FILETIME] runnning out from the function date()
        if (!file_exists($this->file_scrapped_filename) || $filetime > filemtime($this->file_scrapped_filename)) {
            clearstatcache(); // filetime() stores his results in aplication chace, we must clean it out.

            $file_handle = fopen($this->file_scrapped_filename, 'w');
            fwrite($file_handle, $scraped_page);
            print 'File created'."\n";
        }

        return file_exists($this->file_scrapped_filename)? true: false;
    }

    public function set_url($url) {
        $this->url = $url;
        return true;
    }



}

//not closing the PHP tag coz while handling large files it can cause problem in a buffer, dont ask me why