(PHP 4, PHP 5, PHP 7)
dirname — Returns a parent directory's path
$path
[, int $levels
= 1
] )
Given a string containing the path of a file or directory, this function
will return the parent directory's path that is
levels
up from the current directory.
path
A path.
On Windows, both slash (/) and backslash (\) are used as directory separator character. In other environments, it is the forward slash (/).
levels
The number of parent directories to go up.
This must be an integer greater than 0.
Returns the path of a parent directory. 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.
Version | Description |
---|---|
7.0.0 |
Added the optional levels parameter.
|
5.0.0 | dirname() is now binary safe |
Example #1 dirname() example
<?php
echo dirname("/etc/passwd") . PHP_EOL;
echo dirname("/etc/") . PHP_EOL;
echo dirname(".") . PHP_EOL;
echo dirname("/usr/local/lib", 2);
The above example will output something similar to:
/etc / (or \ on Windows) . /usr
Note:
dirname() operates naively on the input string, and is not aware of the actual filesystem, or path components such as "..".
Note:
dirname() is locale aware, so for it to see the correct directory name with multibyte character paths, the matching locale must be set using the setlocale() function.
Note:
Since PHP 4.3.0, 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.
Check the following change example:
<?php
//before PHP 4.3.0
dirname('c:/'); // returned '.'
//after PHP 4.3.0
dirname('c:/x'); // returns 'c:\'
dirname('c:/Temp/x'); // returns 'c:/Temp'
dirname('/x'); // returns '\'
?>