標題：
<?php $this::$a ?> is correct and can be executed correctly but Dreamweaver CC says it has syntax error!
內容：
Steps to Reproduce Bug:
1.  Create a PHP file
2.  Write the following codes:
<?php
class A {
  static $b = 10;
  function a() {
    echo $this::$b;
  }
}

Results: 
DW says " echo $this::$b;" has syntax errors. However, if you change it to " echo $this->$b;", PHP will report errors instead!

Expected Results:
DW shouldn't say " echo $this::$b;" is an error.