无法使用php中的foreach正确保存数据

Question

I am passing the $data as a parameter to a setter function in my model. var_dump($data) gives

array(2) {
  ["iconUrl"]=>
  string(31) "C:\fakepath\photo-125301449.jpg"
  ["title"]=>
  string(8) "Example1"
}
array(2) {
  ["iconUrl"]=>
  string(30) "C:\fakepath\photo-71823413.jpg"
  ["title"]=>
  string(12) "Example2"
}

I then do a foreach inside the setter function

foreach($data as $val) {
    $this->goalLink = [
        'iconUrl' => $val['iconUrl'],
        'title' => $val['title']
    ];
}

The constructor is defined like this

protected $goalLink = [];
public function __construct() {
    $this->goalLink = [
        [
            'iconUrl' => null,
            'title' => null
        ]
    ];   
}

Then there is finally a createNew() which sends data to my API

$client = API::client();
$url = API::url('exampleURL');
$data = [
    'goalLink' => [
        'iconUrl' => $this->goalLink['iconUrl'],
        'title' => $this->goalLink['title']
    ]
];
$response = $client->post($url, ['json' => $data]);

Now the problem is the data in not getting saved properly only data from the 2nd array is getting saved. Somewhere the the data is getting overwritten.

This is the response i am getting from the API

goalLink":[{"iconUrl":"C:\\fakepath\\photo-71823413.jpg","title":"Example2"}]

but it should have actually saved like this

goaloalLink":[{"iconUrl":"C:\fakepath\photo-125301449.jpg","title":"Example1"}, {"iconUrl":"C:\\fakepath\\photo-71823413.jpg","title":"Example2"}]