PHP - Add Item to array within loop

Question

I am using a PHP framework CodeIgniter to throw together a quick project. I am running into a PHP related issue with one of my loops/arrays and I am looking for a push in the right direction.

PHP Database Call:

public function get_feed_data()
    {
            $query = $this->db->query('SELECT c.id, c.name, c.age, c.photoName, c.photoNameSmall, c.panelColor , IFNULL(SUM(t.points), '.MAX_POINTS.') as totalPoints
                                    FROM children as c 
                                    LEFT JOIN behaviorRatings as r
                                    ON c.id = r.childID
                                    LEFT JOIN behaviorTypes as t
                                    ON r.behaviorID = t.behaviorTypeID
                                    GROUP BY c.id');
            return $query->result();
    }

My Controller:

    $feedData   =   $this->display_model->get_feed_data();
    $output = array();

    foreach($feedData as $d)
    {
        $rating = $this->_current_behavior($d->totalPoints[0]);
        $d['rating'] = $rating;
        $output[] = $d;
    }

    $response              = array();
    $response['timestamp'] = $currentmodif;
    $response['children']  = $output;
    echo json_encode($response);

The Issue:

The database call returns multiple records of data from the tables without any issues. However, I am trying to add another key/value pair to that array that is calculated through another function.

In the array, I am trying to add the key rating with the value of $rating.

The error I am getting is Cannot use object of type stdClass as array. I assumed that $feedData was an array that I could have just pushed this value into but that doesn't seem to be the case.

Any thoughts?

change $d['rating'] = $rating; to $d->rating = $rating. as the error suggests, the array $feedData actually a bunch of stdClass not another array, so you only need to use it as object. luckily, php is such a nice language, it lets you to add object properties on a whim. — Bagus Tesa
– Bagus Tesa, Commented Dec 30, 2016 at 1:34

Dekel · Accepted Answer · 2016-12-30 01:34:48Z

7

Your problem is that probably the $d variable is stdClass (and not Array) and therefore you can't use $d[..] on that object, because this syntax is for Array access, and not Objects.

The syntax to access Object's members is ->:

$d->rating = $rating;

So your complete loop will look like:

foreach($feedData as $d)
{
    $rating = $this->_current_behavior($d->totalPoints[0]);
    $d->rating = $rating;
    $output[] = $d;
}

answered Dec 30, 2016 at 1:34

Dekel

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