title: Substring to take all letters after the 4th character
body: <p>I only have a basic understanding of substring. I am trying to extract the first 4 characters as a string variable and extract the rest of the characters in another string variable. How may I do this with substring? With PHP </p>
  
  <pre><code>$rest = substr("jKsuSportTopics", -3, 1);
  $rest2 = substr("jKsuSportTopics", 4, 0);
  </code></pre>