Online PHP editor | refs for hEZff

@ 2014-08-04T15:02:54Z

<?php

function a () { 
  function b() { 
    echo "I am b.\n"; 
  } 
  echo "I am a.\n"; 
} 
if (function_exists("b")) echo "b is defined.\n"; else echo "b is not defined.\n"; 
a(); 
if (function_exists("b")) echo "b is defined.\n"; else echo "b is not defined.\n";