title: PHP script stops without error message (Which error type?)
body: <p>a PHP script stops without an error message, if I change the signature of a method of a class, which implements a intereface, e.g.:</p>
  
  <pre><code>interface A
  {
    public function somefunction();
  }
  
  class B implements A
  {
    public function somefunction(XY $xy);
    {
     ... 
    }
  } 
  </code></pre>
  
  <p>This is an error of course, but there is no error message shown.</p>
  
  <p>What is the name of this error type? (I already searched a lot, but with the wrong phrases obviously)
  How can I log or output this error?</p>
  
  <p>I'm using PHP 5.3.1 (with XAMPP for Windows 1.7.3)</p>
  
  <p>(I used Zend Debugger with PHP &lt; 5.3 earlier, where those erros were shown in the Eclipse console, but now I'm using XDebug.)</p>
  
  <p>Thanks in advance for any hint!</p>