title: split string by any amount of whitespace in PHP
body: <p>I know how to split a string so the words between the delimitor into elements in an array using .explode() by " ". </p>
  
  <p>But that only splits the string by a single whitespace character. How can I split by any amount of whitespace?</p>
  
  <p>So an element in the array end when whitespace is found and the next element in the array starts when the first next non-whitespace character is found.</p>
  
  <p>So something like <code>"The quick   brown        fox"</code> turns into an array with The, quick, brown, and fox are elements in the returned array.</p>
  
  <p>And <code>"jumped over the lazy dog"</code> also splits so each word is an individual element in the returned array.</p>