How can i get value ItemSum by ItemID in php?

Question

I have json return:

{ "items": [ { "ItemID": 810, "ItemSum": 2 }, { "ItemID": 902, "ItemSum": 5 } ], "es": "", "ec": 0 }

How can I get value ItemSum by ItemID in php ?

Answer 1

Like so:

$result = json_decode('{ "items": [ { "ItemID": 810, "ItemSum": 2 }, { "ItemID": 902, "ItemSum": 5 } ], "es": "", "ec": 0 }');
foreach($result->items as $item) {
    var_dump($item->ItemSum);
}

Also, definitely read what's at the link @Paul Crovella commented with.

Answer 2

How can I get value ItemSum by ItemID in php ?

You need to go through the items and look for the ItemID, e. g.:

$object = json_decode('{ "items": [ { "ItemID": 810, "ItemSum": 2 },
                                    { "ItemID": 902, "ItemSum": 5 } ], "es": "", "ec": 0 }');

function getSumbyID($object, $ID)
{
    foreach ($object->items as $item) if ($item->ItemID == $ID) return $item->ItemSum;
}

echo getSumbyID($object, 902), "\n";