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源码：

// 爬虫
class Crawler {
    private $crawler_url;
    function __construct($url) {
        $this->crawler_url = $url;
    }
    function GetUrlContent() {
        $url = $this->crawler_url;
        $handle = fopen ( "$url", "r" );
        if ($handle) {
            $content = stream_get_contents ( $handle, 1024 * 2048 );
            return $content;
        } else {
            return false;
        }
    }
    function get_url_result() {
        $match = '/href=[\'\"]{0,1}\/news-[0-9]*\.asp\" title=[\'\"][^a-zA-Z]*\"/';
        $content = $this->GetUrlContent ();
        if (preg_match_all ( $match, $content, $result )) {
            return $result;
        } else {
            return false;
        }
    }
    function deal_result() {
        $result = $this->get_url_result ();
        foreach ( $result as $list ) {
            $list = str_replace ( 'href=', "http://info.scau.edu.cn", $list );
            $list = str_replace ( '"', '', $list );
            $results [] = str_replace ( 'title=', ' ', $list );
        }
        return $results;
    }
    function write() {
        $result = $this->deal_result ();
        $fp = fopen ( "list.txt", "w" );
        foreach ( $result as $lists ) {
            foreach ( $lists as $list ) {
                fputs ( $fp, $list . "\r\n" );
            }
        }
        fclose ( $fp );
        echo "succeed";
    }
}

$crawler = new Crawler ( "http://info.scau.edu.cn" );
$crawler->write ();

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