用imagepng上传Facebook API照片

Question

I have a quiz application on Facebook. It uploads a photo to user's photos at the end of the quiz.

$photo_upload = $facebook->api('/me/photos', 'POST', array(
                                                'source' => '@' . './images/userimg.png',
                                                'message' => $message,
                                                )
                                            );

But it is a sample image, the same for everyone. I want to make it personal by writing the user's name on the image. Part of create-img.php :

try {
    $user_profile = $facebook->api('/me');
}
catch (FacebookApiException $e) {
            error_log($e);
            $user_id = null; }

$username = iconv("UTF-8", "ISO-8859-2", $user_profile['name']);

$text = iconv("ISO-8859-2", "UTF-8", "Hello ". $username);

...

header('Content-type: image/png') ;

            ImagePNG($image) ;

            ImageDestroy($image) ;

            imagepng($image, "./images/imgs_to_post/sample_userimg.png");

            exit ;

It can be included in HTML, works fine, the image shows up with the user's name.

<img src="create-img.php" alt="" />

But when I try to put create-img.php as source in the API call above, i get an error.

Fatal error: Uncaught OAuthException: (#1) An unknown error occurred thrown in /home/mmdesign/public_html/.../php-sdk/base_facebook.php on line 1128

How can I put the result image of imagepng in the API call as source?

Thank you in advance.

Answer 1

But when I try to put create-img.php as source in the API call above, i get an error.

Of course, because that file contains PHP code, not image data. (If you think the PHP code is parsed at this point, you're wrong.)

Write the image to HDD first, and then feed the API the path to that image.