php 从 URL 下载文件到服务器
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Download File to server from URL
提问by xaav
Well, this one seems quite simple, and it is. All you have to do to download a file to your server is:
嗯，这个看起来很简单，确实如此。将文件下载到服务器所需要做的就是：
file_put_contents("Tmpfile.zip", file_get_contents("http://someurl/file.zip"));
Only there is one problem. What if you have a large file, like 100mb. Then, you will run out of memory, and not be able to download the file.
只有一个问题。如果你有一个大文件，比如 100mb。然后，您将耗尽内存，并且无法下载该文件。
What I want is a way to write the file to the disk as I am downloading it. That way, I can download bigger files, without running into memory problems.
我想要的是一种在下载文件时将文件写入磁盘的方法。这样，我可以下载更大的文件，而不会遇到内存问题。
回答by alex
Since PHP 5.1.0, file_put_contents()supports writing piece-by-piece by passing a stream-handle as the $dataparameter:
从 PHP 5.1.0 开始，file_put_contents()支持通过将流句柄作为$data参数传递来逐段编写：
file_put_contents("Tmpfile.zip", fopen("http://someurl/file.zip", 'r'));
From the manual:
从手册：
If data[that is the second argument] is a stream resource, the remaining buffer of that stream will be copied to the specified file. This is similar with using
stream_copy_to_stream().
如果data[即第二个参数] 是流资源，则该流的剩余缓冲区将被复制到指定的文件。这与使用
stream_copy_to_stream().
(Thanks Hakre.)
（感谢哈克雷。）
回答by xaav
private function downloadFile($url, $path)
{
$newfname = $path;
$file = fopen ($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);
}
}
回答by prodigitalson
Try using cURL
尝试使用卷曲
set_time_limit(0); // unlimited max execution time
$options = array(
CURLOPT_FILE => '/path/to/download/the/file/to.zip',
CURLOPT_TIMEOUT => 28800, // set this to 8 hours so we dont timeout on big files
CURLOPT_URL => 'http://remoteserver.com/path/to/big/file.zip',
);
$ch = curl_init();
curl_setopt_array($ch, $options);
curl_exec($ch);
curl_close($ch);
I'm not sure but I believe with the CURLOPT_FILEoption it writes as it pulls the data, ie. not buffered.
我不确定，但我相信CURLOPT_FILE它在提取数据时写入的选项，即。没有缓冲。
回答by Kamil Kie?czewski
prodigitalson's answerdidn't work for me. I got missing fopen in CURLOPT_FILEmore details.
prodigitalson 的回答对我不起作用。我得到了missing fopen in CURLOPT_FILE更多细节。
This worked for me, including local urls:
这对我有用，包括本地网址：
function downloadUrlToFile($url, $outFileName)
{
if(is_file($url)) {
copy($url, $outFileName);
} else {
$options = array(
CURLOPT_FILE => fopen($outFileName, 'w'),
CURLOPT_TIMEOUT => 28800, // set this to 8 hours so we dont timeout on big files
CURLOPT_URL => $url
);
$ch = curl_init();
curl_setopt_array($ch, $options);
curl_exec($ch);
curl_close($ch);
}
}
回答by stra8edge
- Create a folder called "downloads" in destination server
- Save [this code] into
.phpfile and run in destination server
- 在目标服务器中创建一个名为“downloads”的文件夹
- 将 [此代码] 保存到
.php文件中并在目标服务器中运行
Downloader :
下载器：
<html>
<form method="post">
<input name="url" size="50" />
<input name="submit" type="submit" />
</form>
<?php
// maximum execution time in seconds
set_time_limit (24 * 60 * 60);
if (!isset($_POST['submit'])) die();
// folder to save downloaded files to. must end with slash
$destination_folder = 'downloads/';
$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);
}
?>
</html>
回答by Dimmy
set_time_limit(0);
$file = file_get_contents('path of your file');
file_put_contents('file.ext', $file);
回答by Hoan Huynh
回答by Pradeep Kumar Prabaharan
Use a simple method in php copy()
在php中使用一个简单的方法 copy()
copy($source_url, $local_path_with_file_name);
Note: if the destination file already exists, it will be overwritten
注意：如果目标文件已经存在，它将被覆盖
Note: You need to set permission 777 for the destination folder. Use this method when you are downloading to your local machine.
注意：您需要为目标文件夹设置权限 777。下载到本地计算机时使用此方法。
Special Note: 777 is a permission in Unix based system with full read/write/execute permission to owner, group and everyone.In general we give this permission to assets which are not much needed to be hidden from public on a web server. Example: images folder.
特别注意：777 是基于 Unix 的系统中的权限，具有所有者、组和所有人的完全读/写/执行权限。通常，我们会向不需要在 Web 服务器上公开隐藏的资产授予此权限。示例：图像文件夹。
回答by Hoàng V? Tgtt
I use this to download file
我用它来下载文件
function cURLcheckBasicFunctions()
{
if( !function_exists("curl_init") &&
!function_exists("curl_setopt") &&
!function_exists("curl_exec") &&
!function_exists("curl_close") ) return false;
else return true;
}
/*
* Returns string status information.
* Can be changed to int or bool return types.
*/
function cURLdownload($url, $file)
{
if( !cURLcheckBasicFunctions() ) return "UNAVAILABLE: cURL Basic Functions";
$ch = curl_init();
if($ch)
{
$fp = fopen($file, "w");
if($fp)
{
if( !curl_setopt($ch, CURLOPT_URL, $url) )
{
fclose($fp); // to match fopen()
curl_close($ch); // to match curl_init()
return "FAIL: curl_setopt(CURLOPT_URL)";
}
if ((!ini_get('open_basedir') && !ini_get('safe_mode')) || $redirects < 1) {
curl_setopt($ch, CURLOPT_USERAGENT, '"Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.1.11) Gecko/20071204 Ubuntu/7.10 (gutsy) Firefox/2.0.0.11');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
//curl_setopt($ch, CURLOPT_REFERER, 'http://domain.com/');
if( !curl_setopt($ch, CURLOPT_HEADER, $curlopt_header)) return "FAIL: curl_setopt(CURLOPT_HEADER)";
if( !curl_setopt($ch, CURLOPT_FOLLOWLOCATION, $redirects > 0)) return "FAIL: curl_setopt(CURLOPT_FOLLOWLOCATION)";
if( !curl_setopt($ch, CURLOPT_FILE, $fp) ) return "FAIL: curl_setopt(CURLOPT_FILE)";
if( !curl_setopt($ch, CURLOPT_MAXREDIRS, $redirects) ) return "FAIL: curl_setopt(CURLOPT_MAXREDIRS)";
return curl_exec($ch);
} else {
curl_setopt($ch, CURLOPT_USERAGENT, '"Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.1.11) Gecko/20071204 Ubuntu/7.10 (gutsy) Firefox/2.0.0.11');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
//curl_setopt($ch, CURLOPT_REFERER, 'http://domain.com/');
if( !curl_setopt($ch, CURLOPT_FOLLOWLOCATION, false)) return "FAIL: curl_setopt(CURLOPT_FOLLOWLOCATION)";
if( !curl_setopt($ch, CURLOPT_FILE, $fp) ) return "FAIL: curl_setopt(CURLOPT_FILE)";
if( !curl_setopt($ch, CURLOPT_HEADER, true)) return "FAIL: curl_setopt(CURLOPT_HEADER)";
if( !curl_setopt($ch, CURLOPT_RETURNTRANSFER, true)) return "FAIL: curl_setopt(CURLOPT_RETURNTRANSFER)";
if( !curl_setopt($ch, CURLOPT_FORBID_REUSE, false)) return "FAIL: curl_setopt(CURLOPT_FORBID_REUSE)";
curl_setopt($ch, CURLOPT_USERAGENT, '"Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.1.11) Gecko/20071204 Ubuntu/7.10 (gutsy) Firefox/2.0.0.11');
}
// if( !curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true) ) return "FAIL: curl_setopt(CURLOPT_FOLLOWLOCATION)";
// if( !curl_setopt($ch, CURLOPT_FILE, $fp) ) return "FAIL: curl_setopt(CURLOPT_FILE)";
// if( !curl_setopt($ch, CURLOPT_HEADER, 0) ) return "FAIL: curl_setopt(CURLOPT_HEADER)";
if( !curl_exec($ch) ) return "FAIL: curl_exec()";
curl_close($ch);
fclose($fp);
return "SUCCESS: $file [$url]";
}
else return "FAIL: fopen()";
}
else return "FAIL: curl_init()";
}
回答by Eric Leroy
A PHP 4 & 5 Solution:
PHP 4 & 5 解决方案：
readfile()will not present any memory issues, even when sending large files, on its own. A URL can be used as a filename with this function if the fopen wrappers have been enabled.
readfile()本身不会出现任何内存问题，即使在发送大文件时也是如此。如果已启用 fopen 包装器，则可以将 URL 用作此函数的文件名。
