[PHP] Retrieving photos after you save it using facebook graph api.

In this tutorial, I will assume that you already create a code that will upload photos from your site to user's facebook account.
But if you're not and you're looking for that part, you can visit this tutorial
[PHP] Upload picture to facebook using Graph AP


Let's begin.

Things to have.
1. We need to know the title of the album where we want to get the photos. If you are done with the code on "how to upload picture to facebook using Graph API", for sure you have tested this and you know the title of the album where your uploaded photo goes.


Here are the steps we are going through.
1. We need to get the access token.
2. We need to get the id of the specific album we want to get photos.
3. We are going to get all the photos inside that album.

<?php

$app_id = "YOUR App ID/API Key";
$app_secret = "YOUR App Secret";

//Take NOTE: this must include http://
//ex. http://text2imagestatus.com/index.php
$post_login_url = "THE PAGE WHERE YOU ARE GOING TO SAVE THIS FILE";

$code = $_REQUEST["code"];

//Obtain the access_token with publish_stream permission
if (!$code)
{
    $dialog_url= "http://www.facebook.com/dialog/oauth?"
    . "client_id=" . $app_id
    . "&redirect_uri=" . urlencode( $post_login_url)
    . "&scope=publish_stream,user_photos";
    echo("<script>top.location.href='" . $dialog_url
    . "'</script>");
}
else
{

    $token_url="https://graph.facebook.com/oauth/access_token?"
    . "client_id=" . $app_id
    . "&client_secret=" . $app_secret
    . "&redirect_uri=" . urlencode( $post_login_url)
    . "&code=" . $code;
    $response = file_get_contents($token_url);
    $params = null;
    parse_str($response, $params);
    $access_token = $params['access_token'];


    //get the albums
    $get_album = "https://graph.facebook.com/me/albums?access_token=$access_token";
    $album = file_get_contents($get_album);
    $album = json_decode($album, true);

    //count the number of albums
    $count_album = count($album['data']);


    //loop until the title of the album reach
    for($i=0; $i<$count_album; $i++)
    {
        if($album["data"][0]["name"] == 'TITLE OF THE ALBUM')
        {
            $id_album = $album["data"][0]["id"];
            break;
        }
    }


    //get photos in the album
    $get_photo = "https://graph.facebook.com/$id_album/photos?access_token=$access_token";
    $photo = file_get_contents($get_photo);
    $photo = json_decode($photo, true);

    //count the number of photos
    $count_photo = count($photo['data']);

    //loop to get all the source url of photos
    for($i=0; $i<$count_photo; $i++)
    {
        $source = $photo["data"][$i]["source"];
        $printme .= "<img src='$source' /></br>";
    }
   
   //this will print the photos that we got from the album
   echo"$printme";

    //this will printout the array of albums and photos for you to see them
    echo '<pre>';
    print_r($album);
    print_r($photo);
    echo '</pre>';

}
?>

[PHP] Upload picture to facebook using Graph API

This code is intented to post photo to user's timeline using your website.
As of today: January 09, 2013 this code is 100% tested and working!



This code has 2 parts.

• First: You can control what image you want to post like http://sharefavoritebibleverses.com/images/bible_verses.png

• Second: The user will upload image coming from their computer file.

First Part
You can control what image you want to post like http://sharefavoritebibleverses.com/images/bible_verses.png

<?php
      $app_id = "YOUR APP ID";
      $app_secret = "YOUR APP SECRET";
     
      //Take NOTE: this must include http://
      //ex. http://sharefavoritebibleverses.com/fb_connect.php       
      $post_login_url = "THE PAGE WHERE YOU ARE GOING TO SAVE THIS FILE"; 
     
      //Take NOTE: this must include http://
      $photo_url = "http://sharefavoritebibleverses.com/images/bible_verses.png";
     
      //you can add link to your image caption, but you can't use this tag <a href='http://link.com' >visit my link</a>
      $photo_caption = "create another verse at http://sharefavoritebibleverses.com";

  $code = $_REQUEST["code"];

  //Obtain the access_token with publish_stream permission
  if (!$code)
  {
    $dialog_url= "http://www.facebook.com/dialog/oauth?"
      . "client_id=" .  $app_id
      . "&redirect_uri=" . urlencode( $post_login_url)
      .  "&scope=publish_stream";
     
    echo("<script>top.location.href='" . $dialog_url
      . "'</script>");
  }
  else
  {
    $token_url="https://graph.facebook.com/oauth/access_token?"
      . "client_id=" . $app_id
      . "&client_secret=" . $app_secret
      . "&redirect_uri=" . urlencode( $post_login_url)
      . "&code=" . $code;
     
    $response = file_get_contents($token_url);
    $params = null;
    parse_str($response, $params);
    $access_token = $params['access_token'];

    // POST to Graph API endpoint to upload photos
    $graph_url= "https://graph.facebook.com/me/photos?"
      . "url=" . urlencode($photo_url)
      . "&message=" . urlencode($photo_caption)
      . "&method=POST"
      . "&access_token=" .$access_token;

    echo '<html><body>';
       
       echo file_get_contents($graph_url);
   
    echo '</body></html>';
  }
?>

This will output something like this
{"id":"517833744917123","post_id":"100000713303095_517823648251456"}


you can change this        
   
    echo file_get_contents($graph_url);
   
into this    

    $ok = file_get_contents($graph_url);
       
    if($ok)
        echo'<script language="JavaScript">window.location="index.php";</script>';
       

so you can direct them to any page you want after they submitted the photo.
or you can do any conditions you want.   

**************************************************************************************************

Second Part
The user will upload image coming from their computer file.

<?php
      $app_id = "YOUR APP ID";
      $app_secret = "YOUR APP SECRET";
     
      //Take NOTE: this must include http://
      //ex. http://sharefavoritebibleverses.com/fb_connect.php       
      $post_login_url = "THE PAGE WHERE YOU ARE GOING TO SAVE THIS FILE"; 
   
       $code = $_REQUEST["code"];

       //Obtain the access_token with publish_stream permission
       if(empty($code))
       {
          $dialog_url= "http://www.facebook.com/dialog/oauth?"
           . "client_id=" .  $app_id
           . "&redirect_uri=" . urlencode( $post_login_url)
           .  "&scope=publish_stream";
          
          echo("<script>top.location.href='" . $dialog_url
          . "'</script>");
         }
        else
        {
          $token_url="https://graph.facebook.com/oauth/access_token?"
           . "client_id=" . $app_id
           . "&redirect_uri=" . urlencode( $post_login_url)
           . "&client_secret=" . $app_secret
           . "&code=" . $code;
          
          $response = file_get_contents($token_url);
          $params = null;
          parse_str($response, $params);
          $access_token = $params['access_token'];

         // Show photo upload form to user and post to the Graph URL
         $graph_url= "https://graph.facebook.com/me/photos?"
         . "access_token=" .$access_token;


         echo '<html><body>';
         echo '<form enctype="multipart/form-data" action="'
         .$graph_url .' "method="POST">';
         echo 'Please choose a photo: ';
         echo '<input name="source" type="file"  ><br/><br/>';
         echo 'Say something about this photo: ';
         echo '<input name="message"
             type="text" value=""><br/><br/>';
         echo '<input type="submit" value="Upload"/><br/>';
         echo '</form>';
         echo '</body></html>';
        
       
      }
?>

this will output something like this

{
   "id": "517839871583123",
   "post_id": "100000713303022_517839881583112"
}

PHP - Problem in saving the image using imagepng

Probably you are familiar with the code below.

I am assuming that you successfully prints the image 

and only having a problem in saving it.

This code will do the solution!

Tested and working! 

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


 
// this will print your image 
imagepng($img);
 
// set where you want your image to be saved 
// take note that you have to save the image 
// into another directory for this to work. 
$filename = "any_name"; 
$directory = "folder/".$filename.".png";
 
// set the directory with 0755 permission
chmod($directory,0755);
 
// this will save your image 
imagepng($img, $directory, 0, NULL);
 
 
imagedestroy($img);