php读取远程图片到本地
$message   //文章内容
    //正则(这个还不是)
    $reg = /]*src=(http://(.+)/(.+).(jpg|gif|bmp|bnp))/isu;
    //把抠出来的 img 地址存放到 $img_array 变量中
    preg_match_all($reg, $message, $img_array, preg_pattern_order);
    //过滤重复的图片
    $img_array = array_unique($img_array[1]);
复制代码第二步. 把$img_array 数组循环一下. 做图片保存和文章位置替换 foreach ($img_array as $img){
        //判断是否是自己网站上的 图片
        if('xxx.com' != get_domain($img)){// 如果这个图片不是自己服务器上的
            //读取图片文件
            $gimg = new getimage();
            $gimg->source = $img;
            $gimg->save_to = './data/temp/';
            $file =  $gimg->download(); //图片移动到本地
            //保存到相册 得到图片保存的位置
            $img_path = pic_save($file,0,'');
            //文本路径替换
            $message = str_replace($img, $img_path, $message);
}
    }
....这时候 $message 里面已经图片已经替换为自己服务器本地的地址,并且图片也保存到自己的服务器上.
复制代码//下面一个函数 和 类是从网络上找的.
//从url中获得域名
function get_domain($url){
    $pattern = /[w-]+.(com|net|org|gov|cc|biz|info|cn)(.(cn|hk))*/;
    preg_match($pattern, $url, $matches);
    if(count($matches) > 0) {
        return $matches[0];
    }else{
        $rs = parse_url($url);
        $main_url = $rs[host];
        if(!strcmp(long2ip(sprintf(%u,ip2long($main_url))),$main_url)) {
            return $main_url;
        }else{
            $arr = explode(.,$main_url);
            $count=count($arr);
            $endarr = array(com,net,org,3322);//com.cn  net.cn 等情况
            if (in_array($arr[$count-2],$endarr)){
                $domain = $arr[$count-3]...$arr[$count-2]...$arr[$count-1];
            }else{
                $domain =  $arr[$count-2]...$arr[$count-1];
            }
            return $domain;
        }// end if(!strcmp...)
    }// end if(count...)
}// end function
// 从远程吧图片载到服务器本地 的 类
class getimage {
var $source;
var $save_to;
var $quality;
function download($method = 'curl') {
    $info = @getimagesize($this->source);
    $mime = $info['mime'];
// what sort of image?
    $type = substr(strrchr($mime, '/'), 1);
    switch ($type){
        case 'jpeg':
            $image_create_func = 'imagecreatefromjpeg';
            $image_save_func = 'imagejpeg';
            $new_image_ext = 'jpg';
// best quality: 100
            $quality = isset($this->quality) ? $this->quality : 100;
            break;
case 'png':
            $image_create_func = 'imagecreatefrompng';
            $image_save_func = 'imagepng';
            $new_image_ext = 'png';
// compression level: from 0  (no compression) to 9
            $quality = isset($this->quality) ? $this->quality : 0;
            break;
case 'bmp':
            $image_create_func = 'imagecreatefrombmp';
            $image_save_func = 'imagebmp';
            $new_image_ext = 'bmp';
            break;
case 'gif':
            $image_create_func = 'imagecreatefromgif';
            $image_save_func = 'imagegif';
            $new_image_ext = 'gif';
break;
case 'vnd.wap.wbmp':
            $image_create_func = 'imagecreatefromwbmp';
            $image_save_func = 'imagewbmp';
            $new_image_ext = 'bmp';
            break;
case 'xbm':
            $image_create_func = 'imagecreatefromxbm';
            $image_save_func = 'imagexbm';
            $new_image_ext = 'xbm';
            break;
default:
            $image_create_func = 'imagecreatefromjpeg';
            $image_save_func = 'imagejpeg';
            $new_image_ext = 'jpg';
    }
if(isset($this->set_extension)){
        $ext = strrchr($this->source, .);
        $strlen = strlen($ext);
        $new_name = basename(substr($this->source, 0, -$strlen)).'.'.$new_image_ext;
    }else{
        $new_name = basename($this->source);
    }
$save_to = $this->save_to./blog_insert_temp_.time().mt_rand(1,99)...$new_image_ext;
    //输出对象 组成跟$_file变量一样 得到后自己和平常图片上传处理一样了
    $img_info['name'] = basename($this->source);
    $img_info['type'] = $mime;
    $img_info['size'] = 1000;
    $img_info['tmp_name'] = $save_to;
    $img_info['error'] = 0;
if($method == 'curl'){
        $save_image = $this->loadimagecurl($save_to);
    }elseif($method == 'gd'){
        $img = $image_create_func($this->source);
if(isset($quality)){
               $save_image = $image_save_func($img, $save_to, $quality);
            }else{
               $save_image = $image_save_func($img, $save_to);
            }
}
         return $img_info;
    }
function loadimagecurl($save_to){
        $ch = curl_init($this->source);
        $fp = fopen($save_to, wb);
// set url and other appropriate options
        $options = array(curlopt_file => $fp,
                         curlopt_header => 0,
                         curlopt_followlocation => 1,
                         curlopt_timeout => 60); // 1 minute timeout (should be enough)
curl_setopt_array($ch, $options);
curl_exec($ch);
        curl_close($ch);
        fclose($fp);
}
}