title: Preg_match address
body: <p>So i'm trying to preg_match an address in PHP.</p>
  
  <p>It should be letters SPACE numbers and not numbers SPACE letters.
  So, like this: Myplace 16.
  The length of the numbers and letters doesn't matter, but they can't be mixed together.</p>
  
  <p>I already tried this one but this one doens't check spaces:</p>
  
  <pre><code>if(preg_match("/^[0-9a-zA-Z_]{5,}$/", $adres) === 0)
  {
  echo 'Address is wrong';
  }
  </code></pre>
  
  <p>Thanks in advance!</p>