Encode nested JSON array in php - php

Question

I want to send nested JSON array.Which contain following format.
${"posts":[{
"abc":"123",
"xyz":"123",
"pro":[{
"name":"Brinjal",
"qty":"500 gms"
},
{
"name":"Brinjal",
"qty":"500 gms"
}]
}]
}
Here is my php code:
$rows = $stmt->fetchAll();
if ($rows) {
$order["posts"] = array();
foreach ($rows as $row) {
$post = array();
$post["order_id"] = $row["order_id"];
$post["order_totalamount"] = $row["order_totalamount"];
$post["address"] = $row["address"];
$post["pincode"] = $row["pincode"];
$post["delivery_timeslot"] = $row["delivery_timeslot"];
$post["order_date"] = $row["order_date"];
$query1= "query";
$rows1 = $stmt->fetchAll();
if ($rows1) {
foreach ($rows1 as $row1) {
$query2= "query";
$rows2 = $stmt->fetchAll();
$post["product"] = array();
if ($rows2) {
$products = array();
foreach ($rows2 as $row2) {
$products["product_name"]=$row2["product_name"];
$products["prod_qty"] = $row2["product_minquantity"];
}
array_push($post["product"],$products);
echo json_encode($products);
}
}
}
array_push($order["posts"], $post);
}
echo json_encode($order);
}
From above code I got result:
$ {"posts":
[{
"order_id":"18",
"order_totalamount":"40",
"address":"2, Chetan Society, Vadodara",
"pincode":"390023",
"delivery_timeslot":"Zone wise delivery",
"order_date":"2016-03-18 17:50:53",
"product":[{"product_name":"Brinjal","prod_qty":"500 gms"}]
}]
}
But my actual product array is:
${"product_name":"Banana","prod_qty":"1 Kg"}{"product_name":"Brinjal","prod_qty":"500 gms"}
Kindly help out. I am stuck on it. tried a lot but did not get success.

Answer 1

In
foreach ($rows2 as $row2) {
$products["product_name"]=$row2["product_name"];
$products["prod_qty"] = $row2["product_minquantity"];
}
You overwrite $products["product_name"]and $products["prod_qty"] with the values of the last $row2.
The line {"product_name":"Banana","prod_qty":"1 Kg"}{"product_name":"Brinjal","prod_qty":"500 gms"} actually consists of two echo's:
{"product_name":"Banana","prod_qty":"1 Kg"}
{"product_name":"Brinjal","prod_qty":"500 gms"}
But you don't see the difference. I suggest echoing a string in-between them or use something like var_dump() to see how many values you're echoing.
You should do something like:
for ($i = 0; $i < count($rows2); $i++) {
$products[$i]["product_name"]=$rows2[$i]["product_name"];
$products[$i]["prod_qty"] = $rows2[$i]["product_minquantity"];
}
This will result in: [{"product_name":"Banana","prod_qty":"1 Kg"},{"product_name":"Brinjal","prod_qty":"500 gms"}]
FYI $array[] = has the same rsults as array_push(), but had less overhead of calling array_push().
EDIT:
Below a complete example since it doesn't seem to workout for you:
//Demo $order
$order = array (
'posts' =>
array (
0 =>
array (
'order_id' => '18',
'order_totalamount' => '40',
'address' => '2, Chetan Society, Vadodara',
'pincode' => '390023',
'delivery_timeslot' => 'Zone wise delivery',
'order_date' => '2016-03-18 17:50:53',
),
),
);
//Demo $rows2
$rows2 = array(
array(
'product_name' => 'banana',
'product_minquantity' => '1 Kg'
),
array(
'product_name' => 'Brinjal',
'product_minquantity' => '500 gms'
)
);
$post['product'] = array();
if ($rows2) {
$products = array();
for ($i = 0; $i < count($rows2); $i++) {
$products[$i]['product_name'] = $rows2[$i]['product_name'];
$products[$i]['prod_qty'] = $rows2[$i]['product_minquantity'];
}
$post['product'] = $products;
echo json_encode($products); //[{"product_name":"banana","prod_qty":"1 Kg"},{"product_name":"Brinjal","prod_qty":"500 gms"}]
}
//$order['posts'][] = $post;
$order['posts'][0] = $order['posts'][0] + $post;
//In this example I only have 1 item in $order['posts'] so I know to add to key 0.
//In your case you need to know which key of $rows1 you need to do the adding.
//Change the foreach loop of $rows to a for loop as well so you can define your own keynames ($i).
echo '<br>==================================================================<br>';
echo json_encode($order);
/*
{
"posts":[
{
"order_id":"18",
"order_totalamount":"40",
"address":"2, Chetan Society, Vadodara",
"pincode":"390023",
"delivery_timeslot":"Zone wise delivery",
"order_date":"2016-03-18 17:50:53",
"product":[
{
"product_name":"banana",
"prod_qty":"1 Kg"
},
{
"product_name":"Brinjal",
"prod_qty":"500 gms"
}
]
}
]
}
*/