PHP receives binary stream save picture solution

PHP receives binary stream save picture
Now do PHP to receive pictures from the ipad, save and display in the background, how to receive AH and save as a picture ah, passed over is the twos into the data circulated, seeking expert guidance Thank you
------Solution--------------------
Just write the picture. File_put_contents ("File.png", $data);
------Solution--------------------

Take picture binary
Put a picture test.jpg under the C drive
function Imgdata ()
{
    $img _file = ' c:/test.jpg ';
    $fp = fopen ($img _file, ' RB ');
    $content = Fread ($fp, FileSize ($img _file)); Binary data
    Fclose ($FP);
    return $content;
}
/**
* Save the binary as a picture
* $dxycontent Picture binary data
* $filepath Picture Path
* $filename Picture Name
*/
function Imgsave ($dxycontent, $filepath, $filename)
{
    Get the binary raw data from the post.
    $file = fopen ($filepath. $filename, "w"); Open file ready to write
    Fwrite ($file, $dxycontent); Write
    Fclose ($file); Shut down   
}

Imgsave (Imgdata (), "d:/", "test.jpg");

------Solution--------------------

$stream = file_get_contents (' php://input ');

$GD = imagecreatefromstring ($stream);

Imagepng ($GD, '/xxx.png ');

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