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php批量下载网页图片并替换路径为本地

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Jun 13, 2016 am 10:02 AM

phpdownloadforcontentpicturecopybringusbatchreplacelocalnowofWeb pagepath

我们现在要复制别人网站上的带有图片的内容到自己网站，这样我必须下载别人网的图片，然后保存到本地，再把内容中的图片地址替换成我们本地的，这里我们要借助于php中preg_match_all,file_get_contents,str_replace三个函数即可。

一篇文章复制过来，发现图片路径都是别人网站的，如何一键下载这些图片到本地，并且修改成为本地的路径呢。

代码如下

复制代码

/**
* 获取替换文章中的图片路径
* @param string $xstr 内容采集网页的content
* @param string $keyword 创建照片的文件名我写upimg
* @param string $oriweb 网址一般写null
* @return string
*
*/
function replaceimg($xstr,$keyword, $oriweb){
$basedir = dirname(__FILE__);

    //保存路径
    $d = date('Ym', time());
    $dirslsitss = $basedir.'/../uploads/'.$keyword.'/'.$d;//分类是否存在
    if(!is_dir($dirslsitss)) {
        @mkdir($dirslsitss, 0777);
    }

    //匹配图片的src
    preg_match_all('# php批量下载网页图片并替换路径为本地

]*>#i', $xstr, $match);

    foreach($match[1] as $imgurl){

        $imgurl = $imgurl;

        if(is_int(strpos($imgurl, 'http'))){
            $arcurl = $imgurl;
        } else {
            $arcurl = $oriweb.$imgurl;
        }
        $img=file_get_contents($arcurl);

        if(!empty($img)) {

            //保存图片到服务器
            $fileimgname = time()."-".rand(1000,9999).".jpg";
            $filecachs=$dirslsitss."/".$fileimgname;
            $fanhuistr = file_put_contents( $filecachs, $img );
            $saveimgfile = "/uploads/$keyword"."/".$d."/".$fileimgname;

            $xstr=str_replace($imgurl,$saveimgfile,$xstr);
        }
    }
    return $xstr;
}

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