title: (WordPress) How to use if OR if post?
body: <p>I want to show some HTML code for specific posts, so I put this on HEADER templete:</p>
  
  <pre><code>&lt;?php if(is_single(24) || is_single(34)) { ?&gt;
  MY HTML CODES
  &lt;?php } ?&gt;
  </code></pre>
  
  <p>I tried those too:</p>
  
  <pre><code>&lt;?php if(is_single(24) &amp;&amp; is_single(34)) { ?&gt;
  &lt;?php if((is_single(24)) &amp;&amp; (is_single(34))) { ?&gt;
  &lt;?php if((is_single(24)) || (is_single(34))) { ?&gt;
  </code></pre>
  
  <p>And its not working. If I put this code for single post, like this:</p>
  
  <pre><code>&lt;?php if(is_single(24) { ?&gt;
  </code></pre>
  
  <p>Its working well.. but I need to do that for many posts.</p>