What pitfalls should be noted when moving from C# to PHP?
<p>So, I just stumbled across this one in another <a href="http://stackoverflow.com/questions/2321009/are-abstract-class-constructors-not-implicitly-called-when-a-derived-class-is-ins">question</a>: </p>

<blockquote>
  <p>Parent constructors are not called
  implicitly if the child class defines
  a constructor.</p>
</blockquote>

<p>What else should one be aware of when writing code in PHP from a C# background?</p>
