include 与 include_once 除了加载次数的区别还有是否能获取文件return 数据的区别

先准备两个文件, route.php 我们要获取这个文件中return 的数组； init.php 是我们获取的代码文件。

route.php

<?php
return array (
  'article/:id\d/:cid\d' => 'portal/article/index',
  'list/:id\d' => 'portal/list/index',
  'product/:id\d/:term_id\d' => 'portal/product/index',
  'news' => 'portal/list/index?id=8',
  'page/:id\d' => 'portal/page/index',
  'study' => 'portal/index/study',
);

init.php

<?php

$get = include "route.php";

var_dump($get);

$get2 = include_once "route.php";
var_dump($get2);

打印结果:

macbook-pro-xiao:demo chenxiao$ php init.php 
array(6) {
  ["article/:id\d/:cid\d"]=>
  string(20) "portal/article/index"
  ["list/:id\d"]=>
  string(17) "portal/list/index"
  ["product/:id\d/:term_id\d"]=>
  string(20) "portal/product/index"
  ["news"]=>
  string(22) "portal/list/index?id=8"
  ["page/:id\d"]=>
  string(17) "portal/page/index"
  ["study"]=>
  string(18) "portal/index/study"
}
bool(true)

总结：

• include 可以获取到 route.php 中 return 的数组
• include_once 只能获取到true