Insert array into another array based on if command - putting it in wrong place

Question

I have this array:

$arr = array( 'reportDescription' => array( 'reportSuiteID' => 'globretailprod', 'elements' => array( 0 => array( 'id' => $queryElement ) ), 'metrics' => array( 0 => array( 'id' => $queryMetric ) ) ) );

I'm trying to insert some code into the array using an if command. This is what I have:

if (isset($querySegment)) { $arr['reportDescription']['segments'] = $querySegment; }

However that gives me the wrong result, what I am trying to achieve is this:

{ "reportDescription": { "reportSuiteID": "rbsglobretailprod", "dateFrom": "2018-09-09", "dateTo": "2018-09-10", "dateGranularity": "day", "metrics": [{ "id": "pageviews" }], "elements": [{ "id": "page" }], "segments": [{ "id": "jjj" }] } }

Notice there are two issues with this. Firstly, segments isn't isn't insert with an id, it's just inserted as a value. Secondly, I am a bit concerned about the trailing comma after metrics in my original array, since I need to be able to add a comma after the metrics array if I do include segments.

Use $arr['reportDescription']['segments'] = ["id" => $querySegment] — Mohammad
– Mohammad, Commented Oct 6, 2018 at 9:50
"Firstly, segments isn't isn't insert with an id, it's just inserted as a value" -> what do you mean by this? The JSON representation of an array will not show indices. If you want it as an object, you can use the JSON_FORCE_OBJECT option of json_encode. — Jeto
– Jeto, Commented Oct 6, 2018 at 9:55
Please state what your code outputs, so we can compare with what you want to accomplice — Alexios Tsiaparas
– Alexios Tsiaparas, Commented Oct 6, 2018 at 9:57

Nigel Ren · Accepted Answer · 2018-10-06 09:52:31Z

Just use the same format as you use for the other items to get the same structure...

if (isset($querySegment)) { $arr['reportDescription']['segments'] = array( 0 => array( 'id' => $querySegment ) ); }

As for the comma, this should be added automatically as needed if your using json_encode()

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