PHP MongoDb在数组中更新$

Question

From the MongoDB command line I can do

db.user.update({userid: {$in: [435707147,88513850,466518582]}},{$unset: {f1 : 1}})

Which will remove the variable f1 from all user objects in the DB. How would you translate that to PHP syntax?

I the following runs with no error, but no changes are made to the DB.

$db->user->update(array("userid"=>array('$in'=>$ids)), 
    array('$unset'=> array("f1"=>1)));

Answer 1

Do you set $ids = array(435707147, 88513850, 466518582); ?

You probably also need to say it with 'multiple'=>true to update all of them at once:

$db->user->update(array("userid"=>array('$in'=>$ids)), 
   array('$unset'=> array("f1"=>true)), 
   array('multiple'=>true));