title: php is not equal to and is not equal,equal to
body: <p>I keep seeing variations of this:</p>
  
  <p>Not equal
  <code>!=</code></p>
  
  <p>Not equal, equal</p>
  
  <p><code>!==</code></p>
  
  <p>Which one is the standard or do they have different meanings?</p>
  
  <p>I am guessing the latter also checks the value and the name if it's a string, while the
  former might just check the value  only...</p>