Online PHP editor | refs for mXlvY

@ 2014-08-04T15:05:21Z

<?php

function a () { 
  function b() { 
    echo "I am b.\n"; 
  } 
  echo "I am a.\n"; 
} 

echo function_exists("b") ? "b is defined\n" : "b is not defined";
a(); 
echo function_exists("b") ? "b is defined\n" : "b is not defined";
b();