PHP 手冊
前一頁 |  | 下一頁

# dirname

(PHP 3, PHP 4 , PHP 5)

dirname -- Returns directory name component of path

## Description

string dirname ( string path )

Given a string containing a path to a file, this function will return the name of the directory.

On Windows, both slash (/) and backslash (\) are used as directory separator character. In other environments, it is the forward slash (/).

範例 1. dirname() example

`<?php $path = "/etc/passwd"; $file = dirname($path); // $file is set to "/etc" ?>`

> 注: In PHP 4.0.3, dirname() was fixed to be POSIX-compliant. Essentially, this means that if there are no slashes in path , a dot ('.') is returned, indicating the current directory. Otherwise, the returned string is path with any trailing /component removed. Note that this means that you will often get a slash or a dot back from dirname() in situations where the older functionality would have given you the empty string.

dirname() has changed its behaviour in PHP 4.3.0. Check the following examples:

`<?php //before PHP 4.3.0 dirname('c:/'); // returned '.' //after PHP 4.3.0 dirname('c:/'); // returns 'c:' ?>`

dirname() has been binary safe since PHP 5.0.0

See also basename(), pathinfo(), and realpath().

前一頁 | 內容 | 下一頁
delete | 上一層 | disk_free_space