PHP抓取网页图片的实例

PHP抓取网页图片的实例

<?php
/**
 * 抓取网站上的图片到本地
 * PS: 如果网页中的图片路径不是绝对路径，就无法抓取
 */
set_time_limit(0);//抓取不受时间限制

$URL='http://image.baidu.com/';//任意网址

get_pic($URL);

function get_pic($pic_url) {
    //获取图片二进制流
    $data=CurlGet($pic_url);
    /*利用正则表达式得到图片链接*/
    $pattern_src = '/<[img|IMG].*?src=[\'|\"](.*?(?:[\.gif|\.jpg]))[\'|\"].*?[\/]?>/';
    $num = preg_match_all($pattern_src, $data, $match_src);
    $arr_src=$match_src[1];//获得图片数组
    print_r($arr_src);
    get_name($arr_src);

    echo "<br>finished!!!";
    return 0;
}

/*得到图片类型，并将其保存到与该文件同一目录*/
function get_name($pic_arr) {
    //图片类型
    $pattern_type = '/(\.(jpg|bmp|jpeg|gif|png))/';
    foreach($pic_arr as $pic_item){//循环取出每幅图的地址
        $num = preg_match_all($pattern_type, $pic_item, $match_type);
        if($num){
            $pic_name = get_unique().$match_type[1][0];//改时微秒时间戳命名
            //以流的形式保存图片
            $write_fd = @fopen('./getpic/'.$pic_name,"wb");
            @fwrite($write_fd, CurlGet($pic_item));
            @fclose($write_fd);
            echo "[OK]..!";
        }
    }
    return 0;
}

//通过微秒时间获得唯一ID
function get_unique(){
    list($msec, $sec) = explode(" ",microtime());
    return $sec.intval($msec*1000000);
}

//抓取网页内容
function CurlGet($url){
    $url=str_replace('&amp;','&',$url);
    $curl = curl_init();
    curl_setopt($curl, CURLOPT_URL, $url);
    curl_setopt($curl, CURLOPT_HEADER, false);

    //curl_setopt($curl, CURLOPT_REFERER,$url);
    curl_setopt($curl, CURLOPT_USERAGENT, "Mozilla/4.0 (compatible; MSIE 6.0; SeaPort/1.2; Windows NT 5.1; SV1; InfoPath.2)");
    curl_setopt($curl, CURLOPT_COOKIEJAR, 'cookie.txt');
    curl_setopt($curl, CURLOPT_COOKIEFILE, 'cookie.txt');
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($curl, CURLOPT_FOLLOWLOCATION, 0);
    $values = curl_exec($curl);
    curl_close($curl);
    return $values;
}
?>