title: regex with special characters?
body: <p>i am looking for a regex that can contain special chracters like <code>/ \ . ' "</code></p>
  
  <p>in short i would like a regex that can match the following:</p>
  
  <ul>
  <li>may contain lowercase</li>
  <li>may contain uppercase</li>
  <li>may contain a number</li>
  <li>may contain space</li>
  <li>may contain <code>/ \ . ' "</code></li>
  </ul>
  
  <p>i am making a php script to check if a certain string have the above or not, like a validation check.</p>