How can fb share have prefilled text in textarea "Say something about this"
<p>Here is my code :</p>

<pre><code>&lt;html class=""&gt;
&lt;head&gt;
&lt;!--&lt;![endif]--&gt;
&lt;meta charset="utf-8"&gt;
&lt;meta property="og:title" content="#shareacokesg" /&gt;
&lt;meta property="og:description" content="Personalise the iconic Coca-Cola can with a name and share a Coke with someone special today!" /&gt;
&lt;meta property="og:image" content="http://netbizlabs.com/coke/uploads/&lt;?php echo $text;?&gt;" /&gt;
</code></pre>

<p>Other content is working fine but I want to prefill the textarea which marked in red below :</p>

<p><a href="https://i.stack.imgur.com/lkJOM.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/lkJOM.png" alt="enter image description here"></a></p>

<p>Is this is possible? If yes then how can I achieve this?</p>

<p>Thanks in advance.</p>