title: why is This method constant() in php is giving me warning
body: <pre><code>const MyConstant = "test";
  $declaredcons = "MyConstant";
  echo constant ($declaredcons);//Emits me warning why???
  echo constant ("MyConstant");//How ever not working 
  echo MyConstant;//Outputs test .I dont want to use this...
  </code></pre>
  
  <p>Iam trying to know why it is giving me warning when i const(constantname).Can any one has tried it .Iam using 5.3.6 on windows 7. Is It bug?</p>