村天來了

PHP Magic Constants: __LINE__ , __FILE__ , __FUNCTION__ , __CLASS__ , and __METHOD__

<?php

print(__FILE__);

// C:\xampp\htdocs\test\xx.php

print(__LINE__);

// line 5

sayHello();

$one = new Person();

function sayHello(){

        print(__FUNCTION__);

        // sayHello

}

class Person {

        function __construct() {

                print(__CLASS__);

                // Person          

                print(__METHOD__);

                // Person::__construct

        }

}

?>