DirName (__file__) takes the absolute path to the current file, which means that the lookup speed is the fastest compared to the relative path. For example, the current file is placed under (d:\www\), the file name is test.php.
The code for the test is as follows:
Copy the Code code as follows: <?php
Echo __file__; Get the absolute address of the current file, result: D:\www\test.php
echo dirname (__file__); Get the absolute directory where the current file is located, Result: D:\www\
Echo dirname (DirName (__file__)); Gets the previous level directory name of the current file, results: D:\
?> tips for using methods,
DirName (__file__) takes the absolute path to the current file, which means that the lookup speed is the fastest compared to the relative path.
If you repeat, you can raise the directory up one level:
For example: $d = DirName (dirname (__file__));
The fact is that a directory to dirname () to do the parameters. Because DirName () returns the final directory without \ \ or
So when you reuse it, you can think of dirname () handling the lowest-level directory as a file name. Return as usual
The parent directory of the current directory. That way, you get the top level of the directory.
Files that contain the previous level of the directory
Include (DirName (__file__). ' /.. /filename.php ');
__file__ path is the file where the current code resides
DirName (DirName (__file__)); Get the file on the top of the directory name
DirName (__file__); Gets the directory name of the file.
PHP dirname (__file__) Gets the absolute path of the current file
