Tag for a tag page

How can I get the tag of a tag page, like http://www.domain.com/tag/my-tag so it return my-tag? Is there any function for this? Thanks.

 

Here is how the concept of that works:

<?php

$url = 'http://www.google.com/path/test/two';

# /path/test/two
$parsed = parse_url($url, PHP_URL_PATH);

# path/test/two
$fix = substr($parsed, 1, strlen($parsed) -1);


$parts = explode('/', $fix);
/*
Array
(
    [0] => path
    [1] => test
    [2] => two
)
*/

PHP:

And this next one is a simplified function with comments.

<?php
/***********************
* URI Segment
************************
* Written by Joel Larson (Coded Caffeine)
*   Author URL: http://thejoellarson.com/
*   Date: 26.12.09
***********************/

/**
 * uri_segment()
 *
 * Parses the URI segments from a URL.
 *
 * @access	public
 * @param	int
 * @param	string
 * @return	string
 */
function uri_segment($id = 0, $segment = NULL)
{
	# Parse the segments into one/two/three
	$path = substr(parse_url($segment, PHP_URL_PATH), 1, strlen($segment)-1);
	
	# Explode the forward slash, making a uri segment array.
	$parts = explode('/', $path);
	
	# Return the specified array ID. (Starts at 0)
	return $parts[$id];
}

PHP:

This is how it's called:

<?php
#URL
$url = 'http://example.com/segment/one/two/three';

# Returns 'one'
$segment = uri_segment(1, $url);

PHP:

 

That will work, but do you know how to find the tag at wordpress? Sorry, I guess I didn't give clear description.

 

If you need this in your template files, it's possible to add the function to function.php and use it.

To my knowledge, there isn't a pre-existing function for URI segments.