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POException when uploading photo with Facebook Graph API
 

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  1. POException when uploading photo with Facebook Graph API
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    <p>I would like to upload a photo to facebook for a user in the default album for an application. This is described under publishing here: <a href="http://developers.facebook.com/docs/reference/api/photo" rel="nofollow noreferrer">http://developers.facebook.com/docs/reference/api/photo</a></p> <p>The method has been answered here: <a href="https://stackoverflow.com/questions/2964410/how-can-i-upload-photos-to-album-using-facebook-graph-api">How can I upload photos to album using Facebook Graph API</a>. I am using the following:</p> <pre><code>$args = array( 'message' =&gt; 'Photo Caption', 'image' =&gt; '@'.realpath("image.png") ); $data = $facebook-&gt;api('/me/photos', 'post', $args); </code></pre> <p>However I get the exception "(#324) Requires upload file" when I attempt this. I have a valid session and I have the publish_stream and user_photos permissions. I can retrieve data using the API. The image file is definitely valid because it can be loaded with <code>file_get_contents(realpath("image.png"))</code>.</p> <p>I've tried this solution, using curl, which works perfectly: <a href="https://stackoverflow.com/questions/2718610/upload-photo-to-album/2728275#2728275">Upload Photo To Album with Facebook&#39;s Graph API</a></p> <pre><code>$args = array( 'message' =&gt; 'Photo from application', 'pic.png' =&gt; '@'.realpath('pic.png') ); $tok = $session['access_token'] $url = 'http://graph.facebook.com/'.$album_id.'/photos?access_token='.$tok; $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, $url); curl_setopt($ch, CURLOPT_HEADER, false); curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); curl_setopt($ch, CURLOPT_POST, true); curl_setopt($ch, CURLOPT_POSTFIELDS, $args); $data = curl_exec($ch); </code></pre> <p>Compared with Facebook's PHP SDK curl which looks like this (using the same $args and $url):</p> <pre><code>$ch = curl_init(); $opts = self::$CURL_OPTS; $opts[CURLOPT_POSTFIELDS] = http_build_query($args, null, '&amp;'); $opts[CURLOPT_URL] = $url; curl_setopt_array($ch, $opts); $data= curl_exec($ch); </code></pre> <p>Why doesn't the PHP version work? Looks like the http_build_query() function is interfering with loading the image. I don't know enough about curl to understand what's going on here.</p>
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