php獲取網站內容（file_get_contents）

public function fetchingData() {

header("Content-type:text/html;Charset=utf8");

$url="http://www.itheima.com.com/2017/0329/23.html"; //抓取網站內容

$ret=file_get_contents($url); // 將內容的編碼集由 GB312 替換成UTF-8

$ret=iconv('GB2312', 'UTF-8', $ret); // 替換掉不需要的內容

$ret=str_replace('', '', $ret); $ret =preg_replace("/(\d+)、/", "", $ret); //正則匹配內容數據 

$pattern= "/\(.*)\<\/p\>/i"; preg_match_all($pattern, $ret,$matches); // 正則匹配標題數據 

$titlePattern = "/\(.*)\<\/h2\>/i"; preg_match($titlePattern,$ret, $match); 

$title =$match[1]; // 將匹配結果集放入數據庫 

if(!empty($matches[1])) {
    $filterResult = array_filter($matches[1]); 
    foreach($filterResult as $item) {
        $data =[ 
        'source' => 'http://www.itcast.com', 
        'author'=> $title, 
        'content' => $item, 
        'add_time' => time()
        ]; 

        $id =$this->rhesis->addInfo($data);
        if ($id > 0) {
            echo$item.' add successful!'; echo ""; 
        }
    }
}

}