php实现图片批量下载到本地实例

对于没有防盗链的图片,代码如下:

<?php/* * 对于没有防盗链的图片 * $url 图片地址 * $filename 图片保存地址 * return 返回下载的图片路径和名称,图片大小*/function GrabImage($url, $filepath, $filename = "") {    if ($url == "") return false;    $ext = strrchr($url, ".");    if ($filename == "") {        if ($ext != ".gif" && $ext != ".jpg" && $ext != ".png") return false;        $filename = date("YmdHis");    }    ob_start();    readfile($url);    $img = ob_get_contents();    ob_end_clean();    $size = strlen($img); // 图片大小    !is_dir(getcwd() . $filepath) ? mkdir(getcwd() . $filepath) : null; //生成文件夹    $fp2 = fopen(getcwd() . $filepath . $filename . $ext, "a");    fwrite($fp2, $img);    fclose($fp2);    return array(        $filepath . $filename . $ext,        $size    );}

有防盗链的图片, 代码如下:

/* * 有防盗链的图片 * $url 图片地址 * $filename 图片保存地址 * return 返回下载的图片路径和名称,图片大小 * $fromurl 来源URL，填写来源图片网址可破解防盗链*/function GrabImage2($url, $filepath, $filename = "", $fromurl) {    if ($url == "") return false;    $ext = strrchr($url, ".");    if ($filename == "") {        if ($ext != ".gif" && $ext != ".jpg" && $ext != ".png") return false;        $filename = date("YmdHis");    }    !is_dir(getcwd() . $filepath) ? mkdir(getcwd() . $filepath) : null; //生成文件夹    $re = $this->curlg($url, $fromurl);    $size = file_put_contents(getcwd() . $filepath . $filename . $ext, $re); //返回大小    return array(        $filepath . $filename . $ext,        $size    );}

批量采集代码:

/**  * 批量下载图片 */html' target='_blank'>public function downimg() {    $keep = $this->_get("keep"); //1从缓存获取2删除缓存/重新缓存    $id = $this->_get("id");    $id = $id ? $id : 0;    $nextid = $id + 1;    if ($keep != 1) {        $data = M('Cjlist')->where("status=1")->select();        S("keepcjdata", $data, 3600);    } else {        $data = S("keepcjdata");    }    $endid = count($data);    //echo $id;    //echo $endid;    if ($endid == $id) {        exit('所有图片下载完成！');    }    //echo $endid;    $data2['cover_imgurl'] = $this->imgdown2($data[$id]['cover_imgurl']);    //echo $data[$id]['thum_url'];    $data2['thum_url'] = $this->imgdown2($data[$id]['thum_url'], 'thum_'); //中型图片type    $data2['id'] = $data[$id]['id'];    if (!$data2['thum_url'] || !$data2['cover_imgurl']) {        $data2['status'] = - 1;    } else {        $data2['status'] = 2;    }    $res = M('Cjlist')->save($data2);    //$this->echosql();    if ($res) {        echo '下载完成ID:' . $data2['id'] . " 前往下一个ID下载<script>window.location.href='" . U('Index/downimg') . "/keep/1/id/" . $nextid . "'</script>";    } else {        echo '保存出错，正在重试刷新。<script>window.location.reload()</script>';    }    //dump($data2);    //dump($data);    }

同时还可以生成缩略图, 代码如下:

/* *图片采集保存本地生成缩略图 * * */public function imgdown($picurl = 'http://p0.so.qhimg.com/t0129f40df5810dfaa5.jpg', $fromurl = 'http://image.so.com') {    $mulu = "/" . date("YmdH", time()) . "/";    $reimg = $this->GrabImage2($picurl, $mulu, time() , $fromurl);    //$img = file_get_contents($picurl);    //echo file_put_contents('222.jpg',$img);    //exit;    //$reimg="/20140529/1401333398.jpg";    //dump($reimg);    //exit;    if ($reimg[1] <= 0) {        exit("下载图片失败");    }    $reimg = $reimg[0];    import('ORG.Util.Image');    $Image = new Image();    $imgurl = getcwd() . $reimg;    $ext = strrchr($imgurl, ".");    $thum_name = $Image->thumb($imgurl, "thum_" . time() . $ext, '', '288', '432');    rename(getcwd() . "/" . $thum_name, getcwd() . $mulu . $thum_name); //移动到文件夹里面    $imginfo = $Image->getImageInfo(getcwd() . $mulu . $thum_name);    //dump($imginfo);//开源代码phprm.com    $imgarr['cover_url'] = $reimg;    $imgarr['thum_url'] = $mulu . $thum_name;    $imgarr['thum_w'] = $imginfo['width'];    $imgarr['thum_h'] = $imginfo['height'];    return $imgarr;}

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