php-mongodb: In PHP, how do I fetch an array stored in monogdb?

Can somebody please tell me where/what I'm doing it wrong and how the conversion should take place? I'm new to PHP and MongoDB so please excuse my naivety...

This is my document 开发者_如何学Pythonin mongo:

{ "_id" : "x", "links" : [1,2,3] }

In PHP, I do this:

foreach($cur as $obj) echo $obj['_id'] . "-->" . $obj['links']

My output is:

x-->Array

instead of this:

x-->1,2,3

Thanks in advance!

Just to add clarification to the above answer.. what he's doing is really taking an array and casting it into a string with a ',' as a separator.. since the $obj is coming down as an array you would need to cycle through it (unless you're fine displaying it as such).

foreach($obj['links'] as $link){
   //do something
}

This way you're keeping it in an array format rather than using an operation to cast it to a string.

Try this:

echo $obj['_id'] . "-->" .  implode(',',$obj['links']);