put blank value instead of null in array value php [duplicate]

Question

There is dynamic array that we received from database . It has some null value.

So I want to put empty string instead of null in value

I know, I can check with isset function. But it is dynamic array so it is difficult to find out number of key value pairs.

$hoteldetails = get_hotel_detail($hotel_id);
$response=json_encode($HotelDetail);

get Hotel details fetching from database. It may have some null value Ex- Latitude or longitude can have null. When I encode json_encode it display null.

I also tried array_filter but it is removing null value element. I do not want to remove key value element.

Community · Accepted Answer · 2017-05-23 12:23:43Z

2

PHP Code (modified from Replacing empty string with nulls in array php):

$array = array(
   'first' => NULL,
   'second' => NULL
);

echo json_encode($array);

$array2 = array_map(function($value) {
   return $value === NULL ? "" : $value;
}, $array); // array_map should walk through $array

echo json_encode($array2);

Output:

{"first":null,"second":null}

{"first":"","second":""}

edited May 23, 2017 at 12:23

CommunityBot

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answered Aug 29, 2015 at 6:07

Dr.Tricker

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1 Comment

nitin jain Over a year ago

It is removing key. I do not want to remove key

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