Create a link share feature like facebook

I want to create a feature similar to facebook share link in php or javascript

When we share a link in face开发者_开发百科book, it automatically fetch the thumbnail, title, description etc from that page.

I want to develop same feature

Thanks in Advance

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please try this.

<a expr:name='data ost.title' expr:id='data ost.url' onclick='return addthis_open(this, "", "page_link_you_want_share", "page_link_you_want_share");' onmouseout='addthis_close()' onclick='return addthis_sendto()'><span>share</span></a>

Thanks.