HELP with arrays and URL (easy)

I am trying to pass an array through the URL with an echo statement, but all I ever get is the word Array... Im sure Im doing something stupid... this is what I'm doing... $arr = array ("somthing" => "here"); echo"<a href=\"test2.php3?arr=$arr\">link</a>"; and to view... $key = $arr[somthing]; echo("$arr[somthing]"); but all I get is either the letter A or Array.... how can I fix this? Thanks, Dallas K.