gozap_api/Admin/Asset/add.php

<?php
include_once "../../include/DB.php";

$AssetID="";
$AssetName="";
$AssetCategoryID="";
$IsInServiceCenter=1;

if (isset($_POST["AssetID"]) && !empty($_POST["AssetID"])) {
   $AssetID=$_POST["AssetID"];
}
if (isset($_POST["AssetName"]) && !empty($_POST["AssetName"])) {
   $AssetName=$_POST["AssetName"];
}
if (isset($_POST["AssetCategoryID"]) && !empty($_POST["AssetCategoryID"])) {
   $AssetCategoryID=$_POST["AssetCategoryID"];
}
if (isset($_POST["IsInServiceCenter"]) && !empty($_POST["IsInServiceCenter"])) {
   $IsInServiceCenter=$_POST["IsInServiceCenter"];
}

$AssetInsertSql = "INSERT INTO asset(AssetID, AssetName, AssetCategoryID, IsInServiceCenter) VALUES ('$AssetID','$AssetName','$AssetCategoryID','$IsInServiceCenter')";

$AssetInsertresult = $conn->query($AssetInsertSql);
if ($AssetInsertresult === TRUE) {
    $value = array(
        "AssetID"=>$AssetID,
        "AssetName"=>$AssetName,
        "AssetCategoryID"=>$AssetCategoryID,
        "IsInServiceCenter"=>$IsInServiceCenter,
        "Message"=>"Data saved successfully",
      );
      // Use json_encode() function
      $json = json_encode($value);
}else {
    http_response_code(404);
    $errorMesage= $conn->error;
    $value = array(
      "Message"=>"Something went wrong",
      "Error"=>$errorMesage
    );
    // Use json_encode() function
    $json = json_encode($value);
}
// Display the output
echo ($json);
$conn->close();