MongoDB find

[jhanquar 0]

Hello i'm a mongodb user and i'm testing a script. I'm sure that in the collection features there are json documents. But when I use the find function it gives me a null can someone help me please

 

<?php

$m= new Mongo();

echo '1++++++++++++';

var_dump($m);

$mongodb = $m->arraycghbase_mongo;

echo '2------------';

var_dump($mongodb);

$features = $mongodb->features;

var_dump($features);

echo '3++++++++++';

$results = $features->find();

var_dump($results);

echo '4-----------';

?>