Develop Reference

How to add the image label in Reddit share?

Hi All I integrated the Reddit sharing in my project.
While going to the Reddit share page image share option shown below is not coming.
I need that option along with other existing option as shown below.
Can anyone give an idea how can I fix this one.

You need to fill out meta tags, compatible with Open Graph Protocol. Read more on their website: http://ogp.me/
Sample code:
<meta property="og:image" content="URL" />
<meta property="og:image:type" content="image/jpeg" />

Can I share an HTML player?

I am trying to share a custom HTML/JavaScript player in Facebook. Is it possible?
I have tried with
<meta property="og:video" content="https://***/player.html">
<meta property="og:video:type" content="text/html">
<meta property="og:video:secure_url" content="https://***/player.html">
<meta property="og:video:width" content="500">
<meta property="og:video:height" content="500">
What I want to do is a system like the Twitter player cards. I wish to have my player embed in Facebook in an iframe (like Twitter). This way I can have a custom skin for my player and control it the way I want.
The code above is working if I link an MP3 file in secure_url & video but not when I link the player (example of link: https://***/player.html)
When shared on Facebook I have my link in a "video" element with the source set to my link.

well, youtube and soundcloud use html players for sharing. "https://www.youtube.com/embed/xPR-Ej-ENbk". So it should be possible, I am working on the same issue here, but when rendered on facebook am getting a div with class name "me-cannotplay", and am still trying to figure out if this something related to getting white listed by facebook or if there is something wrong with the html player i am using.

As #WizKid said, a simple answer is that you just cannot embed any javascript in facebook story.

Sharing Image to social media

Did anyone know how to share image + link to social media? (example facebook).
I already try to share link and it works, but i cant find the way to share the full image.

Are you asking about the image share on facebook? If so, you need to link the image with meta tag
<meta property="og:image" content="http://example.com/lamb-full.jpg">
more info: https://developers.facebook.com/docs/web/tutorials/scrumptious/open-graph-object

Post a link and show thumbnails from that link - php

In some websites like facebook, when we post some link it show us thumbnails from that website, Like this in Picture below:
How to do that?

you need to fetch that URL and read the meta tags which will give you some information such as title, description etc. If you need to fetch the image weather read the image meta tag (exists if any) or read the first available image from the web page.

It's just a post/comment like any other. Only thing you need is info about that page. You can use curl for example to fetch page's data. Info you are looking for are in head of document in meta tags.
<meta name="og:type" content="website" />
<meta name="og:image" content="http://cdn.sstatic.net/stackoverflow/img/apple-touch-icon#2.png?v=fde65a5a78c6"/>
<meta name="og:title" content="Post a link and show thumbails from that link - php" />
<meta name="og:description" content="In some websites like facebook, when we post some link it show us thumbnails from that website, Like this in Picture below: How to do that?" />
Take those info and make your post/comment/whatever.
EDIT:
You don`t even need curl, you can use file_get_contents check out this answer

How to generate thumbnail images of HTML pages

I am trying to create thumbnail images for several HTML pages, so the user can have an idea of what the HTML looks like before they open the link. I have searched online but haven't found anything useful.
Could anyone here provide some tips? Thanks so much!
I specifically want this to happen on the server side so the client is not required to load the page

You might want to check out this url: http://html2canvas.hertzen.com/.
Using this script, you can convert the page into a canvas on the client side.
Then you can use that as your thumbnail.

You have to use Open Graph tags in you header tag:
<html>
<head>
<meta property="og:site_name" content="Your Website Name Here" />
<meta
property="og:title"
content="Yourtitle goes here, about 90 characters in length."
/>
<meta
property="og:description"
content="description of URL that is about 300 characters in length."
/>
<meta property="og:image" content="YOURIMAGEURL.JPG" />
<meta property="og:type" content="blog" />
<meta property="og:url" content="http://yourURL.com/" />
</head>
<body></body>
</html>

http://api.s-shot.ru/?=(your url)
and
https://s.wordpress.com/mshots/v1/(your url)
I hope those Help!

http://phantomJs.org offers a free tool to capture HTML locally from a file (if you enable that via a command line parameter and use the file:// URI scheme) or from a website and render it to an image. That is a very well-established very popular tool It's also used by people who write automated tests. There's a wiki page that covers that tool, and similar ones.
It has a cropping option. You could run the output of that through other image manipulation tools to scale it.
As far as getting intelligent previews/thumbnails like Twitter and Facebook do, that I'm not sure of. I know there is an oEmbed protocol that is popular that Twitter and other sites provide, and ways to extract the metadata whereby you could possibly construct your own small HTML file and then render it to an image.
(Note about phantomJs: If you don't get the image quality you want in the rendered image, try raising the quality setting for the image parameter to 100, as well as increasing the page's zoom factor option. I've found zoom factor of 2 produces profoundly better quality than zoom factor 1 - see the API docs regarding zoom).

I couldn't get phantomjs to work for my site for some reason, and in further searching I stumbled on this technique for using an iframe to simulate a thumbnail. Posting this here in case others find it useful.