How to save binary byte array from C# as file in PHP?

Question

In C# (ASP.NET MVC) I have method which opens one file and put all the file content into the byte array like this:

byte[] bytes = File.ReadAllBytes(filename);

On PHP side I have PHP Slim Framework API method which is called from C# and I do a POST JSON object that contains this file byte array -> it has these properties:

myObjectId - int - id of my object
filename - string - file name
fileBytes - array - byte array of this file

You can get the demo of this JSON content here: https://justpaste.it/1d8jq

On PHP side I do json_decode of what I received like this:

$fileObject = json_decode($app->request->getBody());

And I get the same array of bytes in member:

$fileBytes = $fileObject->fileBytes;

The question now is how I can save this byte array into the Word file (it is a Word file). I used this method and it saves but it is some very strange content/strange symbols inside (not the original content)...

$binStr = '';
foreach ($fileBytes as $fileByte) 
{
  $binStr .= pack('i', $fileByte);          
}
$binStr .= "\n";
$fileTemp = '/tmp/'.$filename;
file_put_contents($fileTemp, $binStr);

So, how I can properly save these bytes (this byte array has the same elements/integers in PHP like in C# - looks like it is correctly sent))?

If this matters, C# part is on Windows Server and PHP is on Linux/CentOS server.

Philipp · Accepted Answer · 2017-11-06 21:42:06Z

3

Seems like you have a simple array of bytes as integers, so instead of using pack, you could just use chr. With some array_map magic, this could be written as this.

$fileObject = json_decode($app->request->getBody());
$data = implode(array_map('chr', $fileObject->fileBytes));
file_put_contents('/tmp/' . $fileObject->filename, $data);

answered Nov 6, 2017 at 21:42

Philipp

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