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){ $url=str_replace('&','&',$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; } ?> |