how to tell if address bar url has a certain sequence (php)

My address bar looks like this when the page is loaded

index.php?search=_kfdTourDate:equal:2017-04-15|_kfnTourID:equal:14

If I make a search my address bar looks like this

index.php?search=_kfnTourID:equal:2|_kfdTourDate:equal:2017-04-15|nFOC:bigger_equal:1|

or like this

index.php?search=nTotalPrice:equal:99|tGuestName:equal:John|

I would like to run a function if only address url is in following format

?search=_kfdTourDate:equal:xxxxxxxx|_kfnTourID:equal:xxxxxxxx|

If the url format is as follows it shouldn't run the function.

?search=_kfnTourID:equal:xxxxxxxx|_kfdTourDate:equal:xxxxxxxx|

or

?search=_kfdTourDate:equal:xxxxxxxx|_kfnTourID:equal:xxxxxxxx|tGuestName:equal:John|

I tried to do use $IsSearch = explode(":",$_GET['search'] ); but couldn't make it work.

I would appreciate if you can show me the way to achieve this. Thank you all.

via hijacker83