php - PHP: Crop file/directory path

Question

I have a long path like this - /home/user/www/domain.net/public_html/system/dir/file.php, and I want crop this to get something like - /system/dir/file.php.

Now I am using this code:

$filename = str_replace(array('\\', '/'), DIRECTORY_SEPARATOR, $filename);
$filename = join(DIRECTORY_SEPARATOR, array_slice(explode(DIRECTORY_SEPARATOR, $filename), -3, 3));

And it works, but I think there is a better solution.. Anyone know?

Thanks in advance.

Answer 1

我认为您只需要 web 目录。所以你可以爆炸，/public_html因为它总是会在那里。

例如：

$filename = '/home/user/www/domain.net/public_html/system/dir/file.php';
$path = explode('/public_html', $filename);
echo $path[1];

Answer 2

您可以改用正则表达式。请参阅此示例：

$sFileName  = '/home/user/www/domain.net/public_html/system/dir/file.php';
$iCropCount = 3;
$sResult    = preg_replace('#.*?((\/[^\/]+){'.$iCropCount.'})$#', '$1', $sFileName));
//var_dump($sResult);

省略了操作DIRECTORY_SEPARATOR（因为上面示例的主要意义不在其中）

Answer 3

我找到了其他解决方案：

$filename = '/home/user/www/domain.net/public_html/system/dir/file.php';
explode($_SERVER['DOCUMENT_ROOT'], $filename);
$filename = end($filename);