Process for loading objects automatically

index.php

<? PHP // require ' test1.php ';//require ' test2.php '; New Test2 (); function __autoload ($class) {    require __dir__. ' /‘. $class. " php ';     Echo ($class?>

test2.php

<? PHP // namespace Test2; class Test2 {    publicfunction  __construct () {        echo__file__ ;    }      Public function __destruct () {        echo ' ends ';    ? >

PHP explains that the output of index.php is

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Why does Echo ($class) Execute first?

Process for loading objects automatically