PHP json not showing all related values - php

Question

Hello I have this php code for printing json
<?php
include('databaseconnect.php');
$sql = "SELECT product_id,product_name FROM products WHERE product_id='1'";
$result = $conn->query($sql);
$sql2 = "SELECT GROUP_CONCAT(ss.Name,':',sv.value_s ) as Specifications FROM specifications ss, specification_value sv WHERE sv.specification_ID = ss.specification_ID AND sv.product_id = '1'";
$fetch = $conn->query($sql2);
$sql3 = "select GROUP_CONCAT(v.name,':',vv.value) as variants from variant v,variant_value vv where v.variant_id=vv.variant_id and product_id='1'";
$fetch1 = $conn->query($sql3);
$json['products'] = array();
while ($row = mysqli_fetch_array($result,MYSQLI_ASSOC)){
$json['products'] = $row;
}
$json['products']['specification'] = array();
while ($row = mysqli_fetch_assoc($fetch)){
$specification_array = explode(',', $row["Specifications"]);
$speci_array = array();
foreach($specification_array as $spec){
$spec = explode(':',$spec);
$speci_array[$spec[0]] = $spec[1];
}
$json['products']['specification'] = $speci_array;
//array_push($json['products'],$row_temp);
}
$json['products']['specification']['variants'] = array();
while ($row = mysqli_fetch_assoc($fetch1)){
$variants_array = explode(',', $row["variants"]);
$vari_array = array();
foreach($variants_array as $var){
$var = explode(':',$var);
$vari_array[$var[0]] = $var[1];
}
$json['products']['specification']['variants'] = $vari_array;
//array_push($json['products'],$row_temp);
}
echo Json_encode($json);
?>
and output of this is
{
"products": {
"product_id": "1",
"product_name": "Face Wash",
"specification": {
"brand": "Python",
"product_Description": "very good",
"variants": {
"size": "long"
}
}
}
}
but in this i have one more value for variant i.e.
"size":"small" and that is not showing up.
sorry for bad English please ask me for any clarification before answering
my desired output
{
"products": {
"product_id": "1",
"product_name": "Face Wash",
"specification": {
"brand": "Python",
"product_Description": "very good",
"variants": {
"size": "small"
"size": "long"
}
}
}
}

Answer 1

You can't add same key size twice. The previous key gets overwritten by later.

Answer 2

Since you are repeating the key size again the values are being overwritten. Pass all the required values which are belonging to the same Key in an array.

Answer 3

yes you cant use same key name ..
you can get like
{
"products": {
"product_id": "1",
"product_name": "Face Wash",
"specification": {
"brand": "Python",
"product_Description": "very good",
"variants": [{"size": "small"},{"size": "long"}]
}
}
}

Answer 4

You can do '$vari_array[$var[0]][] = $var[1];' now the size is multidimensional array.
as shown by https://stackoverflow.com/users/1993125/wisdmlabs in comments