how to pass value of varibles in json - php

Question

foreach ($ordersList as $object) {
$entityid = $object->entity_id; //how to give this $entityid with in json
$json='{
"orderNo":$entityid, //here i want to assign the value of $entityid
"customerCode": $customerid,
"dateOrdered": "08-07-2015",
"warehouseId" : ,
"orderLineList":
[
"productId": 1000002,
"qty": 6,
"price": 10
]
}';
}
$data = json_decode($json);
$data_string= json_encode($data);

Answer 1

Don't write JSON strings by hand.
$data = [
"orderNo" => $entityid, //here i want to assign the value of $entityid
"customerCode" => $customerid,
"dateOrdered" => "08-07-2015",
"warehouseId" => null ,
"orderLineList" => [
"productId": 1000002,
"qty": 6,
"price": 10,
],
];
$json = json_encode($data);
json_decode() would give an error for this:
{"orderLineList": [ "productId": 1000002 ]}

Answer 2

Try this code:
foreach ($ordersList as $object) {
//Start with a PHP array
//Don't mess with concatenation, you will get tangled with opening & closing quotes.
//If your information comes in a json format. Use json_decode() to convert it into a PHP array.
//$dateOrder,$warehouseId,$object->customer_id are fictious variables. Replace them with real values.
$orderArray[] = [
'orderNo' => $object->entity_id,
'customerCode' => $object->customer_id,
'dateOrdered' => $dateOrdered,
'warehouseId' => $warehouseId,
'orderLineList' => [
'productId': 1000002,
'qty': 6,
'price': 10
]
];
}
$data_string = json_encode($orderArray);