Manipulate photos url in facebook custom feed (graph API) - php

Question

i'm trying to display some custom facebook feeds on my website from a facebook fan page.
This is a summary sample of the php I used, and it works fine.
[...html code...]
// include the facebook sdk
require_once('resources/facebook-php-sdk-master/src/facebook.php');
// connect to app
$config = array();
$config['appId'] = 'MY_APP_ID';
$config['secret'] = 'MY_SECRET_CODE';
$config['fileUpload'] = false; // optional
// instantiate
$facebook = new Facebook($config);
// set page id
$pageid = "MY_PAGE_ID";
// access to the graph, starting with the feed
$pagefeed = $facebook->api("/" . $pageid . "/feed");
[...html code...]
$i = 0;
foreach($pagefeed['data'] as $post) {
// check if post type is a photo and catch the various part of the graph
if ($post['type'] == 'photo') {
//grab the thumbnail url in the graph
$picture_url = $post['picture'];
//get true sized photo by manipulating its url
$picture_url_big = str_replace("s130x130/","", $picture_url);
echo "<p><img class=\"img-icon\" src=\"" . $post['icon'] . "\"></p>";
echo "<h2 class=\"data-post\">" . date("j-n-Y", (strtotime($post['created_time']))) . "</h2>";
//displaying the photo
echo "<div class=\"img-thumb\"><img src=\"" . $picture_url_big . "\"></div>";
echo "<p class=\"manda-a-capo\"></p>";
if (empty($post['story']) === false) {
echo "<p>" . $post['story'] . "</p>";
} elseif (empty($post['message']) === false) {
echo "<p>" . $post['message'] . "</p>";
}
echo "<p><u><b>Vedi foto</b></u></p>";
echo "<p class=\"manda-a-capo\"></p>";
if ($post['shares']['count'] != "") {
echo "<p class=\"manda-a-capo share-num\">" . $post['shares']['count'] . " condivisioni.</p>";
}
}
$i++;
}
[...other code...]
The facebook graph contains only the thumb url of the photos, that is 130x130px. I discovered that some thumbs have an "/s130x130/" parameter in the url and, if you delete this parameter, you get the photo in its actual size.
So this explains this part of code (as above):
//grab the thumbnail url in the graph
$picture_url = $post['picture'];
//get true sized photo by manipulating its url
$picture_url_big = str_replace("s130x130/","", $picture_url);
//then displaying the photo
echo "<div class=\"img-thumb\"><img src=\"" . $picture_url_big . "\"></div>";
Unfortunately I noticed that not all photos from the page have this parameter and some of them have even a different url structure.
So the final result is that I can reach only few photos in their actual size, others remain a broken link.
Is there a way to manipulate the url to get all the photos in their own actual size?
Any advices?
Thanks.
P.S.
Here's the php to view the fb graph:
<?php
echo "<pre>";
print_r($pagefeed);
echo "</pre>";
?>

Answer 1

I found a temporary solution. In order to display the missing links I've added a php function that checks if the image url exist or not.
function checkRemoteFile($picture_url_big)
{
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,$picture_url_big);
// don't download content
curl_setopt($ch, CURLOPT_NOBODY, 1);
curl_setopt($ch, CURLOPT_FAILONERROR, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
if(curl_exec($ch)!==FALSE)
{
return true;
}
else
{
return false;
}
}
And a control just above the "echo"
if (checkRemoteFile($picture_url_big)) {
//echo "image exist ";
$check = true;
$picture_url_big;
} else {
//echo "image does not exist ";
$check = false;
$picture_url_big = $picture_url;
}