<?php
class Test{
function test1(){
test3();
}
function test2(){
function test3(){
echo " Inner function\n ";
}
test3();
}
function test4(){
test3();
}
}
$test = new Test;
//$test->test1(); // Генерирует ошибку вида PHP Fatal error: Call to undefined function test3()
$test->test2();
$test->test4();
test3();