Cannot use object of type MongoId as array

Question

Im having a problem printing out the values inside a 2d array using echo, it works prefectly using print_r:

print_r($array);

The result of which is :

Array ( [0] => MongoId Object 
( [$id] => 57a789b7ce2350b40e000029 ) [1] => MongoId Object 
( [$id] => 57a72d35ce2350681200002b ) [2] => 3 )

However when i try to access the values using:

echo $similar[0][1];
//or
echo $similar[0][0];

I get the error : 'Cannot use object of type MongoId as array'

I have also tried different types of loops from here incase the error was triggered by accessing the values specifically by element number, however i got the same error and im unsure why. Any help would be appreciated :)

Even this doesn't work? echo $array[0]['_id']; echo $array[1]['_id']; — Said Hasanein
– Said Hasanein, Commented Aug 8, 2016 at 14:03
Ok no actually made a mistake yes i still get the error for one 'echo $similar[0]['_id'];' , for the second one $similar['_id'][1]; nothing is printed but no error either....which is better but still unsure why — D3181
– D3181, Commented Aug 8, 2016 at 14:08

Whiteulver · Accepted Answer · 2016-08-08 14:13:36Z

1

Since $similar[0] is an MongoId object, and want to access its $id then you must use $similar[0]->{'$id'})

in your example elements 0 and 1 are MongoId objects, while element 2 is an integer of 3.

So this is how you print them all

echo $similar[0]->{'$id'}) # gives 57a789b7ce2350b40e000029
echo $similar[1]->{'$id'}) # gives 57a72d35ce2350681200002b
echo $similar[2] # gives 3

edited Aug 8, 2016 at 14:13

answered Aug 8, 2016 at 14:10

Whiteulver

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1 Comment

D3181 Over a year ago

perfect! Thanks for the tip!

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