title: Strict Standards: Non-static method
body: <p>I'm running Ubuntu + PHP 5.4 and got such error:</p>
  
  <blockquote>
    <p>Strict Standards: Non-static method XTemplate::I() should not be
    called statically, assuming $this from incompatible context in
    ...
    on line 339</p>
  </blockquote>
  
  <p>And that method looks like this:</p>
  
  <pre><code>interface ITemplate
  {
      public function I();
  }
  
  class XTemplate implements ITemplate
  {
      public function I()
      {
               ...
      }
  }
  </code></pre>
  
  <p>And this code is running normal on Windows 7 in XAMPP.
  I have found only advices to turn off error_reporing, but I need to solve it.
  Do I need to install some modules on turn on some other settings in php.ini ?</p>