title: Does PHP's filter_var FILTER_VALIDATE_EMAIL actually work?
body: <p>After reading various posts I decided not to use REGEX to check if an email is valid and simply use PHP's inbuilt filter_var function. It seemed to work ok, until it started telling me an email was invalid because I had a number in it.</p>
  
  <p>ie  name@domain.com works, while name2@domain.com doesn't.</p>
  
  <p>Am I missing something or is the <code>filter_var($email, FILTER_VALIDATE_EMAIL)</code> really quite ineffective?</p>