php 如何在 dirname(__FILE__) 上上一级
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php how to go one level up on dirname(__FILE__)
提问by aVC
I have a folder structure as follows:
我有一个文件夹结构如下:
mydomain.com
->Folder-A
->Folder-B
I have a string from Database that is '../Folder-B/image1.jpg', which points to an image in Folder-B.
我有一个来自数据库的字符串,它是“../Folder-B/image1.jpg”,它指向 Folder-B 中的一个图像。
Inside a script in Folder-A, I am using dirname(FILE) to fetch the filename and I get
mydomain.com/Folder-A. Inside this script, I need to get a string that says 'mydomain.com/Folder-B/image1.jpg. I tried
在 Folder-A 的脚本中,我使用 dirname( FILE) 来获取文件名,然后我得到
mydomain.com/Folder-A. 在这个脚本中,我需要得到一个字符串,表示'mydomain.com/Folder-B/image1.jpg. 我试过
$path=dirname(__FILE__).'/'.'../Folder-B/image1.jpg';
This shows up as mydomain.com%2FFolder-A%2F..%2FFolder-B%2Fimage1.jpg
这显示为 mydomain.com%2FFolder-A%2F..%2FFolder-B%2Fimage1.jpg
This is for a facebook share button, and this fails to fetch the correct image. Anyone know how to get the path correctly?
这是一个 facebook 分享按钮,它无法获取正确的图像。有人知道如何正确获取路径吗?
Edit: I hope to get a url >>>mydomain.com%2FFolder-B%2Fimage1.jpg
编辑:我希望得到一个 url >>>mydomain.com%2FFolder-B%2Fimage1.jpg
回答by Petah
For PHP < 5.3 use:
对于 PHP < 5.3 使用:
$upOne = realpath(dirname(__FILE__) . '/..');
In PHP 5.3 to 5.6 use:
在 PHP 5.3 到 5.6 中使用:
$upOne = realpath(__DIR__ . '/..');
In PHP >= 7.0 use:
在 PHP >= 7.0 中使用:
$upOne = dirname(__DIR__, 1);
回答by Bas van Dijk
If you happen to have php 7.0+ you could use levels.
如果您碰巧有 php 7.0+,则可以使用级别。
dirname( __FILE__, 2 )with the second parameter you can define the amount of levels you want to go back.
dirname( __FILE__, 2 )使用第二个参数,您可以定义要返回的级别数量。
回答by Abhishek
Try this
尝试这个
dirname(dirname( __ FILE__))
Edit: removed "./" because it isn't correct syntax. Without it, it works perfectly.
编辑:删除了“./”,因为它的语法不正确。没有它,它可以完美运行。
回答by Shane
You could use PHP's dirname function.
<?php echo dirname(__DIR__); ?>.
That will give you the name of the parent directory of __DIR__, which stores the current directory.
您可以使用 PHP 的 dirname 函数。
<?php echo dirname(__DIR__); ?>. 这将为您提供__DIR__存储当前目录的父目录的名称。
回答by Shane
You can use realpathto remove unnessesary part:
您可以使用realpath删除不必要的部分:
// One level up
echo str_replace(realpath(dirname(__FILE__) . '/..'), '', realpath(dirname(__FILE__)));
// Two levels etc.
echo str_replace(realpath(dirname(__FILE__) . '/../..'), '', realpath(dirname(__FILE__)));
On windows also replace \with /if need that in URL.
如果需要,在Windows 上也替换\为/URL。
回答by Calin Rusu
One level up, I have used:
上一级,我用过:
str_replace(basename(__DIR__) . '/' . basename(__FILE__), '', realpath(__FILE__)) . '/required.php';
or for php < 5.3:
或对于 php < 5.3:
str_replace(basename(dirname(__FILE__)) . '/' . basename(__FILE__), '', realpath(__FILE__)) . '/required.php';
回答by Deniz Porsuk
To Whom, deailing with share hosting environment and still chance to have Current PHP less than 7.0
Who does not have dirname( __FILE__, 2 );it is possible to use following.
对于谁,处理共享托管环境并且仍然有机会拥有 Current PHP 低于 7.0 谁没有dirname( __FILE__, 2 );它可以使用以下。
function dirname_safe($path, $level = 0){
$dir = explode(DIRECTORY_SEPARATOR, $path);
$level = $level * -1;
if($level == 0) $level = count($dir);
array_splice($dir, $level);
return implode($dir, DIRECTORY_SEPARATOR).DIRECTORY_SEPARATOR;
}
print_r(dirname_safe(__DIR__, 2));
回答by d?lo sürücü
dirname(__DIR__,level);
dirname(__DIR__,1);
level is how many times will you go back to the folder
级别是您将返回文件夹的次数
回答by d?lo sürücü
I use this, if there is an absolute path (this is an example):
我使用这个,如果有一个绝对路径(这是一个例子):
$img = imagecreatefromjpeg($_SERVER['DOCUMENT_ROOT']."/Folder-B/image1.jpg");
if there is a picture to show, this is enough:
如果有图片展示,这就够了:
echo("<img src='/Folder-B/image1.jpg'>");

