How to detect current page/article in URL

[lebisol]

Hello there,
I am trying to create a condition in order to detect on which page/article user is currently reading. Goal is then to use this variable to add and controll more "main tabs".
Here is the snip I tried:

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if (isset($_GET['page'])) && page="My-First-Article"
$current_action = 'Article1';
else
$current_action="Any-Other"


Basically I need help to figure out what the "page action" value is in URL ~http://site.com/index.php?page=A-B-C

Not much php skill just ideas .
Thanks for your time!

[jacortina]

To put it simply:

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$_GET['page']

[lebisol]

..and that simply did it 
thanks J.A.Cortina!