php将远程图片保存到本地服务器的实现代码

<"http://".$_SERVER["HTTP_HOST"]; 
     
  $img_array = array(); 
  preg_match_all("/src=[\"|'|\s]{0,}(http:\/\/([^>]*)\.(gif|jpg|png))/isU",$body,$img_array); 
   
  $img_array = array_unique($img_array[1]); 
  $imgUrl = $cfg_uploaddir.'/'.date("ymd", time()); 
  $imgPath = $cfg_basedir.$imgUrl; 
  if(!is_dir($imgPath.'/')) 
  { 
    MkdirAll($imgPath, $GLOBALS['cfg_dir_purview']); 
    CloseFtp(); 
  } 
  $milliSecond = date('His',time()); 
  foreach($img_array as $key=>$value) 
  {  
    if(preg_match("#".$basehost."#i", $value)) 
    { 
      continue; 
    } 
    if(preg_match("#".$basehost."#i", $value)) 
    { 
      continue; 
    } 
    if(!preg_match("#^http:\/\/#i", $value)) 
    { 
      continue; 
    } 
    
    $http=pget($value,'$value',true); 
    $itype=($http['head']['content_type']); 
    if(!preg_match("#\.(jpg|gif|png)#i", $itype)) 
    { 
      if($itype=='image/gif') 
      { 
        $itype = ".gif"; 
      } 
      else if($itype=='image/png') 
      { 
        $itype = ".png"; 
      } 
      else 
      { 
        $itype = '.jpg'; 
      } 
    } 
    $milliSecondN = rand(1000,9999).rand(1000,9999); 
    $value = trim($value); 
    $rndFileName = $imgPath.'/'.$milliSecondN.'-'.$key.$itype; 
    $fileurl = $imgUrl.'/'.$milliSecondN.'-'.$key.$itype; 
 
    $tp = fopen($rndFileName, 'wb'); 
    fwrite($tp, $http['data']); 
    fclose($tp); 
     
    if(file_exists($cfg_basedir.$fileurl)) 
    { 
      $info = ''; 
      $imginfos = GetImageSize($rndFileName, $info); 
      $fsize = filesize($rndFileName); 
      $body = str_replace($value, $fileurl, $body); 
  
    } 
  } 
  return $body; 
} 
 
//调用方式 
echo GetCurContent($body);