PHP：保存对文件的POST响应

Question

I am having a problem with saving a file from a response to a POST request.

I am using Google Charts API to create a chart using a POST request. I am then trying to save the result as an image.

I am following the API documentation as described here: http://code.google.com/apis/chart/docs/post_requests.html

Here is my code:

$file = fopen($url, 'r', false, $context);
$file2 = fopen("test.png", 'w');

while (!feof($file)) {
    $buffer = fgets($file, 8192);
    fwrite($file2, $buffer);
}
fclose($file);

It saves the image partially, up to 20k or so, leaving the bottom part of the image unsaved.

(edit) Here is the working code, using curl:

$handle = curl_init($url);
curl_setopt($handle, CURLOPT_POST, true);
curl_setopt($handle, CURLOPT_FILE, $file);
curl_setopt($handle,CURLOPT_POST,count($request));
curl_setopt($handle, CURLOPT_POSTFIELDS, $request_string);
$data = curl_exec($handle);

Answer 1

Not sure it'll help, but what if you try using fread, instead of fgets -- the first being "binary safe", while the second stops at line ends... Considering you're trying to read from a binary stream, and not a text-file, maybe that can change something ?

If it doesn't change a thing, another idea would be to try using file_get_contents, to download the file as a whole, instead of having to do some kind of loop.

And if it still doesn't work, what about curl ?