Question

how to check if the array exists in php.

I ve the array called $contact[“categories”] in some of the rows in mongodb collection.
some rows doesn’t have that array. how to check if particular array exists in collection??

Answer 1

you can check the index existence like this:

 if (isset($contact["categories"])) {

    }

OR

array_key_exists()

if( array_key_exists('categories', $contact) ) {
}