title: Capitalize first letter of a string (preceded with special characters) - PHP
body: <p>I'd like to capitalize a string like:</p>
  
  <pre><code>¿"hello"?
  </code></pre>
  
  <p>I want my function to return</p>
  
  <pre><code>¿"Hello"?
  </code></pre>
  
  <p>I've tried with regex and preg_match, with no luck...
  Here it is my previous question, related with this one:
  <a href="https://stackoverflow.com/questions/10302582/preg-match-is-matching-two-characters-when-it-should-only-match-one">"preg_match is matching two characters when it should only match one"</a></p>
  
  <p>Thank you all!</p>