PHP error crashing code

Question

I have come to some problems. I've made a wordpress plugin, which automatically gets the most 20 recent Instagram posts and then, in theory, it should make me let to insert the newest image as a shortcode in to the post. Now, the code to reproduce this is:

//define Access token
$accesst= "PUT YOUR INSTAGRAM ACCESS TOKEN HERE";
//userid
$userid= YOUR INSTAGRAM USER ID HERE;
//image count to get
$count=20;
//get api contents
$content = file_get_contents('https://api.instagram.com/v1/users/self/media/recent/?access_token='.$accesst.'&count='.$count);
//converting JSON to object
$standardres = json_decode($content, true);
//array method
foreach($standardres['data'] as $photo) {
   $imageData = base64_encode(file_get_contents($photo['images']['standard_resolution']['url']));
   $images[] = '<img src="data:image/jpeg;base64,' . $imageData . '" />';
}



//create functions for shortcodes
function fone($images){
    return $images[0]; //naudok tik [one]
} 
//shortcodes
add_shortcode( 'one', 'fone');
?>

Basically, I get an error message displaying:

Notice: Uninitialized string offset: 0 in D:\XEMP\htdocs\xd\wordpress\wp-content\plugins\insta-live\insta-live.php on line 29

Any ideas how to solve this? A var_dump() gives me the images above the header.. And please don't point me to unitiliazed string offset thread, because i don't really see it as the same problem.

Answer 1

I haven't used WordPress for awhile but $images looks out of scope. I would maybe try wrapping your API work and referencing it inside the shortcode function, something like below. I would research best practice on this type of thing related to WordPress:

if(!class_exists('MyAPI')) {
    class MyAPI
    {
        # Create an image storage
        protected static $imgs;
        # Access your API
        public function callInstagram($accesst = 'PUT YOUR INSTAGRAM ACCESS TOKEN HERE',$userid = 'YOUR INSTAGRAM USER ID HERE')
        {
            # If you have already set it with content, return it
            if(!empty(self::$imgs['instagram']))
                return self::$imgs['instagram'];
            //image count to get
            $count = 20;
            //get api contents
            $content = file_get_contents('https://api.instagram.com/v1/users/self/media/recent/?access_token='.$accesst.'&count='.$count);
            //converting JSON to object
            $standardres = json_decode($content, true);
            //array method
            foreach($standardres['data'] as $photo) {
                $imageData = base64_encode(file_get_contents($photo['images']['standard_resolution']['url']));
                $images[] = '<img src="data:image/jpeg;base64,' . $imageData . '" />';
            }
            # Set the instagram images store
            if(!empty($images))
                # Assign
                self::$imgs['instagram'] = $images;
            # Return the images if set
            return (isset(self::$imgs['instagram']))? self::$imgs['instagram'] : false;
        }
        # Return the images
        public function getInstagramImg($img = false)
        {
            $imgs = $this->callInstagram();
            if($img !== false)
                return (isset($imgs[$img]))? $imgs[$img] : false;
            # Return all
            return $imgs;
        }
    }
}

//create functions for shortcodes
function fone()
{
    # Create API instance
    $Instagram = new MyAPI();
    # Send back the first image in the list
    return $Instagram->getInstagramImg('0');
} 
//shortcodes
add_shortcode('one', 'fone');

One last note, I am assuming that your API work is correct, you should check that it works first before you start going all crazy trying to figure out why the $images doesn't work. Use print_r() to see if it returns the correct info from Instagram.