title: Regex allowing spaces (for a Phone number regex)
body: <p>I have this regex:</p>
  
  <pre><code>preg_match("#^([0-9]+)$#", $post['telephone'])
  </code></pre>
  
  <p>who allow only numbers (for a phone number in the French type so 0123456789) but I would like to allow spaces. For example allow this type of string: "01 23 45 67 89".</p>
  
  <p>Can you please help me?</p>