Fb:share-button
From Facebook Developer Wiki
Description
Renders a standard Share button in a canvas page for the specified URL or content. You can also use this tag to put a Share button on a Static FBML tab on a Facebook Page.
Important: All attributes in the table below must be written in all lowercase letters.
Note: If you're implementing a Facebook Share button on a Facebook Connect site, you need to use the XFBML version of the tag.
Attributes
| Required | Name | Type | Description | |
| required | class | string | The type of share button. When used as an FBML tag, valid values are url, to render a share of the URL specified with the href attribute, and meta, to render a share with the given data. When used as an XFBML tag, the value must be url. | |
|---|---|---|---|---|
| href | string | The reference URL to share. This attribute is required for the url class only. | ||
| optional | meta | string | The metadata about the shared item. See descriptions of the necessary data. The meta class may contain this attribute. | |
| link | string | The content (such as image thumbnails) for the shared item. See descriptions of the necessary data. The meta class may contain this attribute. |
Examples
<fb:share-button class="url" href="http://apps.facebook.com/example" />
 |
<fb:share-button class="meta">
<meta name="medium" content="blog"/>
<meta name="title" content="Leonidas in All of Us"/>
<meta name="video_type" content="application/x-shockwave-flash"/>
<meta name="video_height" content="345"/>
<meta name="video_width" content="473"/>
<meta name="description" content="That's the lesson 300 teaches us."/>
<link rel="image_src" href="http://9.content.collegehumor.com/d1/ch6/f/6/collegehumor.b38e345f621621dfa9de5456094735a0.jpg"/>
<link rel="video_src" href="http://www.collegehumor.com/moogaloop/moogaloop.swf?clip_id=1757757&autoplay=true"/>
<link rel="target_url" href="http://www.collegehumor.com/video:1757757"/>
</fb:share-button>
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