Can anyone help me with twitter meta data? I got this code:

$document-> setMetaData ('twitter:image', 'http://mysite/logo-twitter.jpg');

But what i actually need is, to replace the url with $image from items in K2 Component.
I`ve try several codes, but they don`t work:

$document-> setMetaData ('twitter:image', '$image');
$document-> setMetaData ('twitter:image', '.$image.');
$document-> setMetaData ('twitter:image', '$images');

I eve try some of the plugins or components provide from Joomla.org, but no success :(

Where did you place this code in your overrides?

/components/com_k2/views/item/view.html.php This is the file that i modify

Everything is working fine, Twitter card is verified:
INFO: Page fetched successfully
INFO: 19 metatags were found
INFO: twitter:card = summary tag found
INFO: Card loaded successfully

But image is not loading from the article in K2, because of this line: $document-> setMetaData ('twitter:image', 'http://mysite/logo-twitter.jpg');
How to set that line to follow the image from article?

This is a core hack and it will lead to losing your changes when you update.

Is there a link to your site?

www.medium.edu.mk the K2 Component is here: www.medium.edu.mk/srednoskolski-medium/niz-hodnicite
It`s not a problem for the update, i`ll change the code every time, tnx for the advice :)

You can use Joomla!"s add customMetaTag in your item.php overrides.
api.joomla.org/cms-3/classes/JDocumentHtml.html#method_addCustomTag

Example:
You can see how the og tag for Facebook is being constructed:
github.com/getk2/k2/blob/master/components/com_k2/views/item/view.html.php#L588-L590