How to pass an array as a URL parameter?

You can serialize the JSON:

myArray = ['aaa', 'bbb', 'ccc'];
var arrStr = encodeURIComponent(JSON.stringify(myArray));
$('#myLink').attr({ href: '/myLink?array=' + arrStr });

If your parsing (on the next page) is done via JavaScript too, you’ll conversely use JSON.parse(). In PHP it would be json_decode().