title: Does variable name length matter for performance in PHP?
body: <p>I have been seen this <a href="https://stackoverflow.com/questions/2443164/does-variable-name-length-matter-for-performance-c">Does variable name length matter for performance C#?</a> topic and have same question about php.</p>
  
  <p>My co-worker (Front-end) have been encoded everything like $o, $r, $x, $m, $c and motivated it best performance. I really very doubt about it and code became difficult to read. </p>
  
  <ol>
  <li>$o - object or obj</li>
  <li>$m - $model</li>
  <li>$r - $query_result or $result </li>
  <li>$x - $xml_node</li>
  </ol>
  
  <p>Every thing look like </p>
  
  <pre><code>            if ( isset ( self::$o[ self::$x -&gt; name ] ) ) :
  
              $c = 'ClassPrefix_' . self::$o[ self::$x -&gt; name ];
  
              $o = new $c;
  
              self::$x -&gt; read ( );
  </code></pre>