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What the real coding involved in making these link previews..means which languages? How can we extract meta tag information in a website. I know these all requires AJAX but I want a bit more clarification to make it for my website !!!
And one more important doubt is can I do it by just using client side languages like extracting meta tag dynamically by javascript function?
I asked this question before, and got a good answer. Is there open-source code for making 'link preview' text and icons, like in facebook?
The solution there used AJAX and PHP – it links to this site: http://www.99points.info/2010/07/facebook-like-extracting-url-data-with-jquery-ajax-php/