title: Concatenate two variables
body: <p>Here's what I'm trying to do:</p>
  
  <pre><code>$errmsg_1 = 'Please make changes to your post';
  $errmsg_2 = 'Please make changes to your post image';
  
  $error = 1;
  
  echo $errmsg_.$error; //'Please make changes to your post';
  </code></pre>
  
  <p>Nothing will work, and there are many error messages like these ones that I have to echo.</p>
  
  <p>Can anyone help?</p>