Update JSON value if exists otherwise add it in PHP

Question

I have a JSON file that contains the following:

{\"faqitem\": [{ \"id\": \"faq1\", \"question\": \"Question 1\"}]}

I am trying to do two things

Answer 1

Your problem is that your logic is incorrect. In the first iteration the ID doesn't match so $newdata will be added. In the second iteration the ID match and the item is going to be updated - but wait. We just added this item in previous iteration! So your loop part should looks like this:

...
$exists = false;
foreach($obj->faqitem as $key => $val)
{
    // update if exists
    if($val->id == $newdata['id']) {
        $val->question = $newdata['question'];
        $exists = true;
    }
}

// add new if not exists
if(!$exists) {
    $newstuff = new stdClass;
    $newstuff->id = $newdata['id'];
    $newstuff->question = $newdata['question'];     
    array_push($obj->faqitem, $newstuff);
}
...