title: Is risk to show session id to publicly?
body: <p>I want to know if someone knows my session id from HTML source, then they can hack my site?</p>
  
  <p>For example, if i set a class in html like this <code>&lt;div class="class&lt;?php echo session_id(); ?&gt;"&gt;&lt;/div&gt;</code></p>
  
  <p>Then the HTML source code (that can be viewed from the browser) wil be <code>&lt;div class="class78345543545c344x"&gt;&lt;/div&gt;</code></p>
  
  <p>Is it risk?</p>