<?php

class Test
{

    public function test()
    {
        $a = 1;

        $b = 2;
    }

    public function test2()
    {
        $a = 1;
        $b = 2;

        $b = 3;
    }

    public function test3()
    {
        $a = 1;
        $b = 2;

        $c = 3;
    }

}

$a = 1;
$b = 2;

$c = 3;

$d = 4;

$e = 5;