使用IN作为参数的数组的语法

Question

Probably a no-brainer but google didn't help me the last 30 minutes so maybe someone has done this already and can nudge me to the right syntax;

I have a typical php-array like

$idArray = array(7) { [0]=> string(13) "55b753312986c" [1]=> string(13) "55b751f83d9f3" [2]=> string(13) "55b752b6ab7fd" [3]=> string(13) "55b7531fbb5ad" [4]=> string(13) "55b75346baae8" [5]=> string(13) "55b752c9aea0a" [6]=> string(13) "55b753417d577" } 

I want to ask in the query if a property is in this array. I tried to put this into a parameter like

$queryParam = array("selectedID" => $idArray);

Next I wanted to query my DB like

MATCH (u:User) --> (n:Node)
WHERE u.id IN {selectedID}
RETURN u 

Somehow the syntax is incorrect and I would appreciate a hint how to type the query accurately. Thanks very much.