How to make json like this from database mysql using php - php

Question

{
"idbarang": "ID-75192864",
"namabarang": "Fruit Tea",
"jenisbarang": "Minuman",
"hargabarang": "6000"
}
i try this
<?php
include 'koneksi.php';
$idbarang = $_GET['id'];
if($idbarang == !null){
$query = mysqli_query($conn, "SELECT * FROM data_barang WHERE id_barang = '$idbarang'");
$result = array();
$i= 0;
while($row = mysqli_fetch_array($query)){
$result[$i]['idbarang'] = $row['id_barang'];
$result[$i]['namabarang'] = $row['nama_barang'];
$result[$i]['jenisbarang'] = $row['jenis_barang'];
$result[$i]['hargabarang'] = $row['harga_barang'];
$i++;
};
echo json_encode($result);
} else {
$query = mysqli_query($conn, "SELECT * FROM data_barang");
$result = array();
$i= 0;
while($row = mysqli_fetch_assoc($query)){
$result[$i]['idbarang'] = $row['id_barang'];
$result[$i]['namabarang'] = $row['nama_barang'];
$result[$i]['jenisbarang'] = $row['jenis_barang'];
$result[$i]['hargabarang'] = $row['harga_barang'];
$i++;
};
echo json_encode($result);
}
?>
and this the result
[
{
"idbarang": "ID-75192864",
"namabarang": "Fruit Tea",
"jenisbarang": "Minuman",
"hargabarang": "6000"
},
{
"idbarang": "ID-96037284",
"namabarang": "Sampoerna",
"jenisbarang": "Rokok",
"hargabarang": "12000"
}
]

Answer 1

I think you are asking why you are always going through the ELSE and never the IF. Thats because of this IF test
if($idbarang == !null){
Instead try
<?php
include 'koneksi.php';
if(!empty($_GET['id'])){
$idbarang = $_GET['id'];
You could also simplify that code quite a lot, and protect it from SQL Injection.
// Do the renaming of column names as part of the query
$sql = 'SELECT id_barang as idbarang, nama_barang as namabarang,
jenis_barang as jenisberang, jenis_barang as hargabarang
FROM data_barang';
if(!empty($_GET['id'])){
// add the WHERE clause on to the base query
$sql .= ' WHERE id_barang = ?';
$stmt = $conn->prepare($sql);
$stmt->bind_param('i', $_GET['id']);
$stmt->execute();
$res = $stmt->get_result();
} else {
$res = $conn->query($sql);
}
// as the renaming is done we can just fetch all the results and convert to a JSON document
$result = $res->fetch_all(MYSQLI_ASSOC);
echo json_encode($result);