PHP中获取当前类名、方法名、函数名魔法常量（第一次用markdown）

<?php

/**
* Created by PhpStorm.
* User: yanfeng
* Date: 2016/3/31
* Time: 13:28
*/
function output()
{
echo "function:<br>";
echo __CLASS__ . "<br>";
echo __METHOD__ . "<br>";
echo __FUNCTION__ . "<br>";
}

class test
{
static function output()
{
echo "class:<br>";
echo __CLASS__ . "<br>";
echo __METHOD__ . "<br>";
echo __FUNCTION__ . "<br>";
output();
}
}

test::output();

class:
test
test::output
output
function:

output
output