( 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
Example 1. dirname() example
$path = "/etc/passwd";
$file = dirname($path); // $file is set to "/etc"
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:
//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(),