When a person posts a link on Facebook, Facebook automatically finds a photo to be used as a thumbnail that shows up in the news feed. Is there some sort of (HTML) markup to surround a photo you'd like to use as the first choice?
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What you want are the <meta> tags that Facebook defines in their documentation on Facebook_Share/Specifying_Meta_Tags.
You don't put the metadata around the image itself, rather, you put it in the head of the document, like this:
<meta name="title" content="The Title Of The Link" />
<meta name="description" content="A description of the link would go here." />
<link rel="image_src" href="http://www.example.com/images/image.jpg" />
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If I want to share links dynamically (from database) how can I specify each one in head. – Jenz Oct 23 '13 at 04:34
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The accepted answer is now out of date. The new way to do it is with an open graph tag e.g.
<meta property="og:image" content="http://example.com/picture.jpg" />
jackocnr
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I used this meta property today and works fine. Some more details including the preview details is available: http://stackoverflow.com/a/18817334/281087 – Web_Developer Jun 17 '15 at 09:04
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keep in mind that if everything doesn't work, than, may be, you should reload Facebook cache. http://developers.facebook.com/tools/lint/
