PHP问题包括全局路径

我一直在面对PHP包含的问题.基于互联网上的阅读,我一直在使用相对路径来灵活处理.

只要我直接在每个文件中引用路径,例如

require_once '../includes/connection.php';  // it works fine.

当我使用全局常量引用此路径时,问题就开始了

require_once getDocumentRoot() . '/includes/connection.php', 

正如它说以下错误.

Warning: require_once(/phpPractices/myApp/includes/connection.php): failed to open stream: No such file or directory in /Applications/XAMPP/xamppfiles/htdocs/phpPractices/myApp/dir1/list.php on line 19".

我在SO中阅读了这么多线程,并遵循以下建议

>使用文件的基本目录将常量定义为DOCUMENT_ROOT. (就像在SO中这样说-> https://stackoverflow.com/a/22912261/1001242)
>还尝试了各种选项,例如DIR,basedir(FILE)等,
>通过set_include_path()方法将我的应用程序目录(/ phpPractices / myApp)添加到include_path(如PHP, How to set include path和http://php.net/manual/en/function.set-include-path.php中所述)

我的函数getDocumentRoot()定义如下.

function getDocumentRoot()
{
    $loc_pos_2 = strpos($_SERVER['REQUEST_URI'], "/", 1);
    $baseDir = substr($_SERVER['REQUEST_URI'], 0, $loc_pos_2);
    $baseDir = $baseDir . "/myApp";
    return $baseDir;
}

注意：我可以看到该文件实际存在.但是,file_exists()方法返回false,我不明白为什么.可能是引起关注的原因吗？

仅供参考,我的目录结构如下.

htdocs
  phpPractices
    myApp --> Web App Root
      includes
         connection.php
      inc
         header.php
         footer.php
         global.php -- contains getDocumentRoot() method and included in header.php
      index.php
      dir1 --> my module specific dir
         list.php --> which needs 'connection.php'

我的list.php包含以下内容

<?php

include_once '../inc/header.php'; // it works fine as I do relative to the path

//require_once '../includes/connection.php'; //works fine
require_once getDocumentRoot() . '/includes/connection.php'; // FAILS! :(

?>

但是没有帮助！任何摆脱这个问题的建议将不胜感激.

提前致谢！

解

感谢所有答复的人们.我有一个新的解决方法可以帮助我:)

1. For all the menu items with links: 

    I use my getDocumentRoot() method which provides me - 
     '/phpPractices/myApp/' --> which is relative to my Web App.

2. For all the include, require functions : 

    I defined a different constant as below & as per this link: 
        https://stackoverflow.com/a/1488293/1001242

    define('APP_BASE_PATH', $_SERVER['DOCUMENT_ROOT'] . '/myApp');

    which returns me the complete absolute path which works fine for file inclusion.

我一直在干预这两者.对于文件包含,getDocumentRoot()的“ / phpPractices / myApp”输出失败,因为它试图在根目录(“ / phpPractices /”)中找到名为“ phpPractices”的目录,这是根本原因.因此,我将它们分为两部分,现在工作正常.

感谢大家.非常感激.

解决方法:

更新您的getDocumentRoot()函数以返回绝对路径

function getDocumentRoot()
{
    return dirname(__FILE__);
}

或在您的需求中使用dirname(__ FILE__)

标签：absolute-path,php,include,global
来源： https://codeday.me/bug/20191009/1877853.html