title: Call function in function from another class PHP
body: <p>I have read a few threads about abstract class here at Stackoverflow and I think it's what I need, but I can't get the declaration straight.</p>
  
  <p>What I want to do is to call a <strong>function2</strong> (in classB) <strong>in a function1</strong> (in classA). </p>
  
  <p>How should I do this?</p>