PHP实现远程下载文件到本地

function httpcopy($url,$file="",$timeout=60) {
$file = empty($file) ? pathinfo($url,PATHINFO_BASENAME) : $file;
$dir = pathinfo($file,PATHINFO_DIRNAME);
!is_dir($dir) && @mkdir($dir,0755,true);
$url = str_replace(" ","%20",$url);

if(function_exists('curl_init')) {
$ch = curl_init();
curl_setopt($ch,CURLOPT_URL,$url);
curl_setopt($ch,CURLOPT_TIMEOUT,$timeout);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,TRUE);
$temp = curl_exec($ch);
if(@file_put_contents($file,$temp) && !curl_error($ch)) {
return $file;
} else {
return false;
}
} else {
$opts = array(
"http"=>array(
"method"=>"GET","header"=>"","timeout"=>$timeout)
);
$context = stream_context_create($opts);
if(@copy($url,$file,$context)) {
//$http_response_header
return $file;
} else {
return false;
}
}
}
?>

< ?php // maximum execution time in seconds set_time_limit (24 * 60 * 60); if (!isset($_POST['submit'])) die(); // folder to save downloaded files to. must end with slash $destination_folder = 'temp/';

$url = $_POST['url'];
$newfname = $destination_folder . basename($url);
$file = fopen ($url,"rb");
if ($file) {
$newf = fopen ($newfname,"wb");
if ($newf)
while(!feof($file)) {
fwrite($newf,fread($file,1024 8 ),1024 8 );
}
}
if ($file) {
fclose($file);
}
if ($newf) {
fclose($newf);
}
?>