使用 curl PHP 从 url 保存图像
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Save image from url with curl PHP
提问by David
I need to save an image from a url using CURL and save it to a folder on my server. I've been battling with this code to no avail. Ideally I'd like to grab the image and save it as "photo1" or something. Help!
我需要使用 CURL 从 url 保存图像并将其保存到我服务器上的文件夹中。我一直在与此代码作斗争，但无济于事。理想情况下，我想抓取图像并将其保存为“photo1”或其他内容。帮助！
function GetImageFromUrl($link)
{
$ch = curl_init();
curl_setopt($ch, CURLOPT_POST, 0);
curl_setopt($ch,CURLOPT_URL,$link);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$result=curl_exec($ch);
curl_close($ch);
return $result;
}
$sourcecode = GetImageFromUrl($iticon);
$savefile = fopen(' /img/uploads/' . $iconfilename, 'w');
fwrite($savefile, $sourcecode);
fclose($savefile);
回答by Komang
try this:
尝试这个：
function grab_image($url,$saveto){
$ch = curl_init ($url);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_BINARYTRANSFER,1);
$raw=curl_exec($ch);
curl_close ($ch);
if(file_exists($saveto)){
unlink($saveto);
}
$fp = fopen($saveto,'x');
fwrite($fp, $raw);
fclose($fp);
}
and ensure that in php.ini allow_url_fopen is enable
并确保在 php.ini allow_url_fopen 中启用
回答by Sabuj Hassan
Option #1
选项1
Instead of picking the binary/raw data into a variable and then writing, you can use CURLOPT_FILEoption to directly show a file to the curl for the downloading.
您可以使用CURLOPT_FILEoption 直接向 curl 显示文件以供下载，而不是将二进制/原始数据选择到变量中然后写入。
Here is the function:
这是函数：
// takes URL of image and Path for the image as parameter
function download_image1($image_url, $image_file){
$fp = fopen ($image_file, 'w+'); // open file handle
$ch = curl_init($image_url);
// curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); // enable if you want
curl_setopt($ch, CURLOPT_FILE, $fp); // output to file
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_TIMEOUT, 1000); // some large value to allow curl to run for a long time
curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0');
// curl_setopt($ch, CURLOPT_VERBOSE, true); // Enable this line to see debug prints
curl_exec($ch);
curl_close($ch); // closing curl handle
fclose($fp); // closing file handle
}
And here is how you should call it:
这是你应该如何称呼它：
// test the download function
download_image1("http://www.gravatar.com/avatar/10773ae6687b55736e171c038b4228d2", "local_image1.jpg");
Option #2
选项#2
Now, If you want to download a very large file, that case above function may not become handy. You can use the below function this time for handling a big file. Also, you can print progress(in %or in any other format) if you want. Below function is implemented using a callbackfunction that writes a chunk of data in to the file in to the progress of downloading.
现在，如果你想下载一个非常大的文件，那么上面的功能可能不会变得很方便。这次您可以使用以下功能来处理大文件。此外，您可以根据需要打印进度（以%或以任何其他格式）。下面的函数是使用一个callback函数来实现的，该函数将一大块数据写入文件中，以了解下载进度。
// takes URL of image and Path for the image as parameter
function download_image2($image_url){
$ch = curl_init($image_url);
// curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); // enable if you want
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_TIMEOUT, 1000); // some large value to allow curl to run for a long time
curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0');
curl_setopt($ch, CURLOPT_WRITEFUNCTION, "curl_callback");
// curl_setopt($ch, CURLOPT_VERBOSE, true); // Enable this line to see debug prints
curl_exec($ch);
curl_close($ch); // closing curl handle
}
/** callback function for curl */
function curl_callback($ch, $bytes){
global $fp;
$len = fwrite($fp, $bytes);
// if you want, you can use any progress printing here
return $len;
}
And here is how to call this function:
这是调用此函数的方法：
// test the download function
$image_file = "local_image2.jpg";
$fp = fopen ($image_file, 'w+'); // open file handle
download_image2("http://www.gravatar.com/avatar/10773ae6687b55736e171c038b4228d2");
fclose($fp); // closing file handle
回答by Franz
If you want to download an image from https:
如果要从 https下载图像：
$output_filename = 'output.png';
$host = "https://.../source.png"; // <-- Source image url (FIX THIS)
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $host);
curl_setopt($ch, CURLOPT_VERBOSE, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_AUTOREFERER, false);
curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0); // <-- don't forget this
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0); // <-- and this
$result = curl_exec($ch);
curl_close($ch);
$fp = fopen($output_filename, 'wb');
fwrite($fp, $result);
fclose($fp);
回答by neoteknic
Improved version of Komang answer (add referer and user agent, check if you can write the file), return true if it's ok, false if there is an error :
Komang 答案的改进版本（添加引用者和用户代理，检查是否可以写入文件），如果可以则返回 true，如果有错误则返回 false：
public function downloadImage($url,$filename){
if(file_exists($filename)){
@unlink($filename);
}
$fp = fopen($filename,'w');
if($fp){
$ch = curl_init ($url);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_BINARYTRANSFER, 1);
$result = parse_url($url);
curl_setopt($ch, CURLOPT_REFERER, $result['scheme'].'://'.$result['host']);
curl_setopt($ch, CURLOPT_USERAGENT,'Mozilla/5.0 (Windows NT 10.0; WOW64; rv:45.0) Gecko/20100101 Firefox/45.0');
$raw=curl_exec($ch);
curl_close ($ch);
if($raw){
fwrite($fp, $raw);
}
fclose($fp);
if(!$raw){
@unlink($filename);
return false;
}
return true;
}
return false;
}
回答by Andi Fitria
This is easiest implement.
这是最简单的实现。
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);
}
}
