This will add the meta data for sharing Knowledgebase articles on Facebook and Twitter.
It gets the article title, description and it selects the first image from the article if any to show on your social share post.
I have separate meta data sections for different pages, this is just the knowledgebase section.
Change the "yourdata" accordingly. Adjust as needed.
<title>{if $catname}{$catname}{/if} - {if $kbarticle.title}{$kbarticle.title} - {/if}{$pagetitle} - {$companyname}</title>
<meta name="description" content="{$kbarticle.text|truncate:150|strip_tags}">
{if preg_match('/< *img[^>]*src *= *["\']?([^"\']*)/i',$kbarticle.text, $result)}
<meta property="og:image"
content="{$result[1]}" />
<meta name="twitter:card" content="summary_large_image">
<meta name="twitter:image" content="{$result[1]}">
{/if}
<meta property="og:title" content="{if $catname}{$catname} -{/if} {if $kbarticle.title}{$kbarticle.title} - {/if}{$pagetitle} - {$companyname}" />
<meta property="og:site_name" content="yourdata"/>
<meta property="og:url" content="http://{$smarty.server.HTTP_HOST}{$smarty.server.REQUEST_URI}" />
<meta property="og:description" content="{$kbarticle.text|truncate:150|strip_tags:false}" />
<meta property="fb:app_id" content="yourdata" />
<meta name="twitter:site" content="@yourdata">
<meta name="twitter:creator" content="@yourdata">
<meta name="twitter:title" content="{if $catname}{$catname} -{/if} {if $kbarticle.title}{$kbarticle.title} - {/if}{$pagetitle} - {$companyname}">
<meta name="twitter:description" content="{$kbarticle.text|truncate:150|strip_tags:false}">