Current is small extension for ExpressionEngine 2 that grabs some useful information about the current page and adds them as global variables.
Create a folder inside your third_party directory and name it ‘current’. You can then either clone this repo into that directory, add this repo as a git submodule, or manually place the ext.current.php file in that directory. Activate the extension through the Add-Ons → Extensions menu.
Current creates some global variables you can use to look cool.
The current URL of the page. Ex: http://www.example.com/shoes.
The total number of URL segments. Ex: For http://www.example.com/bread/rye, it would be ‘2’.
Returns the last URL segment. Ex: For http://www.example.com/sounds/windchimes, it would return ‘windchimes’.
The current URI string. Ex: For http://www.example.com/sounds/windchimes, it would return ‘sounds/windchimes’
The uri_strings of the pages in EE’s tracker array. For example, {tracker_1} is the uri_string of the current page, {tracker_2} would give you the previously visited page, {tracker_3} would give you the page before that, etc.