title: Syntax of HTTP-status headers
body: <p>There're many ways to write an HTTP-status header:</p>
  
  <pre><code>HTTP/1.1 404 Not Found
  Status: 404
  Status: 404 Not Found
  </code></pre>
  
  <p>but which is the semantically-correct and spec-compliant way?</p>
  
  <p>Edit: By status headers I mean <a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html" rel="noreferrer">this</a>, using a function such as PHP's <code>header()</code>.</p>