On Windows, both slash (
/) and backslash
\) are used as directory separator character. In
other environments, it is the forward slash (
Returns the name of the 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
$path = "/etc/passwd";
$file = dirname($path); // $file is set to "/etc"
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:
//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 '\'