在Windows和CentOS上PHP的include / require的不同行为(Different behavior of PHP’s include/require on Windows and CentOS)

 这些是我的PHP应用程序myApp.php和mypartsA/main.php 。 
 
 myApp.php 
 
<?php
echo ("##### myApp is starting now !!! </br>");
require_once('/parts/mypartsA/main.php');
?>
 
 mypartsA / main.php 
 
<?php
echo ("#### mypartsA is required </br>");
?>
 
 myApp.php和mypartsA/main.php的结构如下。 
 
Document_root 
  |
  +--- test
  |     |
  |     +--- myApp.php
  |
  +--- parts
        |
        +--- mypartsA
               |
               +---main.php
 
 我已经在Windows + Apache上使用了这个应用程序一年没有问题但最近我将其迁移到CentOS + Apache然后我得到与include_path相关的致命错误 
 
PHP Warning:  require_once(/parts/mypartsA/main.php) 
[<a href='function.require-once'>function.require-once</a>]
: failed to open stream
: No such file or directory 
in /var/www/html/test/myApp.php on line 12 
PHP Fatal error:  require_once() [<a href='function.require'>function.require</a>]
: Failed opening required (/parts/mypartsA/main.php’
(include_path='.:/php/includes:/usr/share/pear:/usr/share/pear/PEAR:/var/www/html') 
in /var/www/html/test/myAPP.php on line 12
 
 根据PHP.net，如果定义了路径，则include_path将被忽略。 http://www.php.net/manual/en/function.include.php 
 
 我认为在我的情况下，PHP尝试从C:\或/而不是从include_path查找parts目录。 
 
require_once(/parts/mypartsA/main.php);
 
 因此，无论是在Windows上还是在CentOS上， myAPP.php结果myAPP.php必须是致命的错误。 
 
 但我的应用程序已经工作了一年，在Windows上没有错误。 PHP可以正确找到parts目录。 
 
 可以在Windows上尝试上面的代码，看看.. 
 
##### myApp is starting now !!! 
#### mypartsA is required
 
 或者得到错误？ 
 
 现在，我想知道为什么在Windows上运行和在CentOS上运行相同代码的结果是不同的。 
 
 我必须检查PHP.ini中的什么指令？ 
 
 我知道如果我更改此代码以使用$ _SERVER['DOCUMENT_ROOT']添加绝对路径。 
 
require_once($_SERVER['DOCUMENT_ROOT']./parts/mypartsA/main.php);
 
 它会很好用。 但是有许多应用程序具有相同的编码风格，我不想改变所有这些应用程序。 
 
 这些是其他信息。 
 
 include_path值phpinfo（）在Windows上显示 
 
.;C:\PHP;C:\PHP\pear;C:\Apache2.2.22\htdocs
 
 include_path值phpinfo（）在CentOS上显示 
 
.:/php/includes:/usr/share/pear:/usr/share/pear/PEAR:/var/www/html

These are code of my PHP applications myApp.phpand mypartsA/main.php.
 
myApp.php
 
<?php
echo ("##### myApp is starting now !!! </br>");
require_once('/parts/mypartsA/main.php');
?>
 
mypartsA/main.php
 
<?php
echo ("#### mypartsA is required </br>");
?>
 
And myApp.php and mypartsA/main.php are in following structure.
 
Document_root 
  |
  +--- test
  |     |
  |     +--- myApp.php
  |
  +--- parts
        |
        +--- mypartsA
               |
               +---main.php
 
I’ve used this application on Windows+Apache for a year with no problem but recently I migrate this to CentOS+Apache then I get fatal error related to include_path
 
PHP Warning:  require_once(/parts/mypartsA/main.php) 
[<a href='function.require-once'>function.require-once</a>]
: failed to open stream
: No such file or directory 
in /var/www/html/test/myApp.php on line 12 
PHP Fatal error:  require_once() [<a href='function.require'>function.require</a>]
: Failed opening required (/parts/mypartsA/main.php’
(include_path='.:/php/includes:/usr/share/pear:/usr/share/pear/PEAR:/var/www/html') 
in /var/www/html/test/myAPP.php on line 12
 
According to PHP.net if a path is defined the include_path will be ignored. http://www.php.net/manual/en/function.include.php
 
I think in my case PHP tries to find parts directory from C:\ or / not from include_path.
 
require_once(/parts/mypartsA/main.php);
 
Therefore result of myAPP.php must be fatal error whether on Windows or on CentOS.
 
But my application has been working for a year with no error on Windows. PHP can find parts directory correctly.
 
Can sameone try those codes above on Windows and see..
 
##### myApp is starting now !!! 
#### mypartsA is required
 
or get error?
 
Now,I want to know is why results of same code are different between running on Windows and running on CentOS.
 
What dirctive in PHP.ini do I have to check ?
 
I know if I change this code to add absolute path with $ _SERVER['DOCUMENT_ROOT'].
 
require_once($_SERVER['DOCUMENT_ROOT']./parts/mypartsA/main.php);
 
It’ll work well. But there are many applications with same style of coding and I don’t want to change all of them.
 
These are additional information.
 
include_path values phpinfo() shows on Windows
 
.;C:\PHP;C:\PHP\pear;C:\Apache2.2.22\htdocs
 
include_path values phpinfo() shows on CentOS
 
.:/php/includes:/usr/share/pear:/usr/share/pear/PEAR:/var/www/html

原文：https://stackoverflow.com/questions/15539793