php 获取绝对文件路径
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Get an absolute file path
提问by vvr
How to get a absolute file path php
php如何获取绝对文件路径
I have a folder abc and xyz.
我有一个文件夹 abc 和 xyz。
I am including the file a.php of abc in xyz folder using Ajax request by giving relative path which is like:
我使用 Ajax 请求将 abc 的文件 a.php 包含在 xyz 文件夹中，方法是提供如下所示的相对路径：
../a.php
The file a.php contains some actions which are done using Ajax request.
文件 a.php 包含一些使用 Ajax 请求完成的操作。
In xyz folder i want to perform same actions which are perform in abc folder, but when i try to perform those actions it is searching for files in xyz folder instead of abc, so the actions which i want to perform in xyz are not working.
在 xyz 文件夹中，我想执行在 abc 文件夹中执行的相同操作，但是当我尝试执行这些操作时，它正在 xyz 文件夹而不是 abc 中搜索文件，因此我想在 xyz 中执行的操作不起作用。
Please help me how to do this.
请帮助我如何做到这一点。
Updated code:
更新代码：
$(function(){
$.ajax({
type:"POST",
url: "../xyz/a.php",
data: {
"Id": '<?php echo $_GET['Id'];?>'
},
success: function(data){
$("#divId").html(data);
}
});
});
回答by smassey
I recommend you do something like this in your config/index/bootstrap:
我建议你在你的 config/index/bootstrap 中做这样的事情：
define('ROOT_DIRECTORY', dirname(__FILE__).'/');
This way when you need to load files, from other locations, you make all the paths relative to the ROOT_DIRECTORY. for example:
这样，当您需要从其他位置加载文件时，您可以创建相对于 ROOT_DIRECTORY 的所有路径。例如：
require_once(ROOT_DIRECTORY . 'abc/xyz.php');
This will make file inclusions a LOT simpler and will allow you to move the entire project directory to another location ( production server for example ) without breaking any 'path' logic.
这将使文件包含更简单，并允许您将整个项目目录移动到另一个位置（例如生产服务器）而不会破坏任何“路径”逻辑。
Seeing your code update, I see you're really talking about the request from the javascript.. in that case just leave the full url to the file: url:'http://server.com/xyx/abc.php'
看到你的代码更新，我看到你真的在谈论来自 javascript 的请求。
Cheers
干杯
回答by T.Todua
For example, you are in http://your-site.com/folder1/folder2/file.php.
例如，您在http://your-site.com/folder1/folder2/file.php 中。
here are php variables:
这是php变量：
==============================================================================
======I======
__File__; C:\wamp\www\folder1\folder2\file.php
$_SERVER['PHP_SELF']; /folder1/folder2/file.php
//$_SERVER['PHP_SELF'] is the same as $_SERVER["REQUEST_URI"];
======II======
getcwd(); C:\wamp\www\folder1\folder2\
dirname(); OUTPUTS NOTHING - EMPTY NOT ALLOWED
basename(); OUTPUTS NOTHING - EMPTY NOT ALLOWED
__dir__; C:\wamp\www\folder1\folder2
======III======
getcwd( XXX ); OUTPUTS NOTHING - PARAMETER NOT ALLOWED
getcwd( XXX ); OUTPUTS NOTHING - PARAMETER NOT ALLOWED
getcwd( XXX ); OUTPUTS NOTHING - PARAMETER NOT ALLOWED
dirname(__FILE__); C:\wamp\www\folder1\folder2
dirname($_SERVER['PHP_SELF']); /folder1/folder2
dirname(getcwd()); C:\wamp\www\folder1
dirname(dirname()); OUTPUTS NOTHING - EMPTY NOT ALLOWED
dirname(basename()); OUTPUTS NOTHING - EMPTY NOT ALLOWED
basename(__FILE__); file.php
basename($_SERVER['PHP_SELF']); file.php
basename(getcwd()); folder2
basename(dirname()); OUTPUTS NOTHING - EMPTY NOT ALLOWED
basename(basename()); OUTPUTS NOTHING - EMPTY NOT ALLOWED
======IV======
on dirname
dirname(dirname(__FILE__)); C:\wamp\www\folder1
dirname(dirname($_SERVER['PHP_SELF'])); /folder1
dirname(dirname(getcwd())); C:\wamp\www
basename(dirname(__FILE__)); folder2
basename(dirname($_SERVER['PHP_SELF'])); folder2
basename(dirname(getcwd())); folder1;
on basename
dirname(basename(__FILE__)); .
dirname(basename($_SERVER['PHP_SELF'])); .
dirname(basename(getcwd())); .
basename(basename(__FILE__)); file.php
basename(basename($_SERVER['PHP_SELF'])); file.php
basename(basename(getcwd())); folder2
==============================================================================
============EXAMPLES===========
============示例============
Home url
主页网址
<?php echo $_SERVER['HTTP_HOST'];?>
ONLY current FILE url (like: mysite.com/myfile.php)
仅当前文件 url（如：mysite.com/myfile.php）
<?php echo $_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF']; ?>
Current url Fully (like: mysite.com/myfile.php?action=blabla
当前网址完全（如：mysite.com/myfile.php?action=blabla
<?php echo $_SERVER['HTTP_HOST'].$_SERVER["REQUEST_URI"];?>
To get RealPath to the file (even if it is included) (change /var/public_html to your desired root)
获取文件的 RealPath（即使包含它）（将 /var/public_html 更改为您想要的根目录）
<?php
// First step: Get full path
$cur_file=str_replace('\','/',__FILE__);
// Second step: Remove the root path
$cur_file=preg_replace('/(.*?)\/var\/public_html/','',$cur_file);
?>
for wordpress, there exist already pre-defined functions to get plugins or themes url.
对于 wordpress，已经存在预定义的函数来获取插件或主题 url。
回答by vvr
In Ajax request i have changed url like this
在 Ajax 请求中，我更改了这样的 url
url: location.protocol + "//" + location.host + "projectname/foldername/filename.php"
Then it worked perfectly
然后它完美地工作
回答by Andris
Firstly, if you want to include a file in xyzfrom abc, you need to do ../abc/a.php, not ../a.php(unless, of course, the file is on the same level as your both directories).
首先，如果您想在xyzfrom 中包含文件abc，则需要执行../abc/a.php，而不是../a.php（当然，除非该文件与您的两个目录处于同一级别）。
Secondly, the function to convert relative paths to absolute is called realpathand you can find the documentation here.
其次，调用将相对路径转换为绝对路径的函数realpath，您可以在此处找到文档。
If your directory structure was something like this:
如果您的目录结构是这样的：
abc/
xyz/
a.php
...then to get the absolute path of a.phpfrom a file located in one of your directories, you would do
...然后a.php要从位于您的目录之一中的文件中获取绝对路径，您可以这样做
$absolute = realpath('../a.php');
