title: Regex pattern for Validating phone number
body: <p>I have a input string ("My phone number is 860-678 - 2345"). From the input string I need to validate phone number using Regex.</p>
  
  <p>I am using the below pattern but it doesn't work if the phone number contains white Space in it.</p>
  
  <pre><code>[(]?[2-9]{1}[0-9]{2}[)-. ,]?[2-9]{1}[0-9]{2}[-. ,]?[0-9]{4}
  </code></pre>
  
  <p>Thanks.</p>