PHP下载远程文件到本地存储的代码

function GrabImage($url,$filename="") {
if($url=="") return false;
if($filename=="") {
$ext=strrchr($url,".");
if($ext!=".gif" && $ext!=".jpg") return false;
$filename=date("dMYHis").$ext;
}
ob_start();
readfile($url);
$img = ob_get_contents();
ob_end_clean();
$size = strlen($img);
$fp2=@fopen($filename, "a");
fwrite($fp2,$img);
fclose($fp2);
return $filename;
}
function gethttpimage($url){
if(!empty($url)){
$filename=uniqid().strrchr($url,".");
echo $filename;
$get_file=@file_get_contents($url);
if($get_file){
$fp=@fopen($filename,"w");
@fwrite($fp,$get_file);
@fclose($fp);
}
return $imgUrl;
}else{
return false;
}
}
//$img=GrabImage("http://img.it-home.org/data/attachment/forum/2016pic1/error_link.gif","");
$img=gethttpimage("http://img.it-home.org/data/attachment/forum/2016pic1/error_link.gif","");
if($img) echo '
';
else echo "false";
?>