php实现图片批量下载到本地实例

关于直接采集远程机器图片之后再下载到我们本地其实非常的简单,我们通常会使用fopen 与 file_put_contents 或者高级点的curl来实现,下面我整理了几个比较好用的图片下载到本地例子,大家一起看看.

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
 */
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;
}