PHP判断文件是否被引入的方法get_included_files

<?php
// 本文件是 abc.php

include 'test1.php';
include_once 'test2.php';
require 'test3.php';
require_once 'test4.php';

$included_files = get_included_files();

foreach ($included_files as $filename) {
    echo "$filename
";
}

?>

结果：

以上例程会输出：
abc.php
test1.php
test2.php
test3.php
test4.php

查看phpcms的加载文件

D:xampphtdocsduanzuindex.php 
D:xampphtdocsduanzuphpcmsase.php 
D:xampphtdocsduanzuphpcmslibsfunctionsglobal.func.php 
D:xampphtdocsduanzuphpcmslibsfunctionsextention.func.php 
D:xampphtdocsduanzuphpcmslibsfunctionsautoloadplugin.func.php 
D:xampphtdocsduanzuphpcmslibsfunctionsautoloadvideo.func.php 
D:xampphtdocsduanzucachesconfigssystem.php 
D:xampphtdocsduanzuphpcmslibsclassesapplication.class.php 
D:xampphtdocsduanzuphpcmslibsclassesparam.class.php 
D:xampphtdocsduanzucachesconfigs
oute.php 
D:xampphtdocsduanzuphpcmsmoduleshomecommon.php 
D:xampphtdocsduanzuphpcmsmodeluser_model.class.php 
D:xampphtdocsduanzuphpcmslibsclassesmodel.class.php 
D:xampphtdocsduanzuphpcmslibsclassesdb_factory.class.php 
D:xampphtdocsduanzucachesconfigsdatabase.php 
D:xampphtdocsduanzuphpcmslibsclassesdb_mysqli.class.php 
D:xampphtdocsduanzuphpcmslibsclassessendsms.class.php 
D:xampphtdocsduanzuphpcmspluginTaobaoTopSdk.php 
D:xampphtdocsduanzuphpcmspluginTaobaoAutoloader.php

能够窥探项目的加载流程！