php file else condition output is wrong - php

Question

Login.php
<?php
include 'Connection.php';
if(isset($_REQUEST["insert"]))
{
$user = $_GET['user'];
$pwd = $_GET['pass'];
//$sql =sqlsrv_query($conn,"select RegNo,UserName,password from Std_Reg where Username= '$user' and Password = '$pwd'");
$sql = "select RegNo,UserName,password from Std_Reg where Username= '$user' and Password = '$pwd'";
$stmt = sqlsrv_query($conn, $sql);
$result = array();
if (!empty($stmt)) {
// check for empty result
if (count($stmt) > 0) {
$stmt = sqlsrv_fetch_array($stmt, SQLSRV_FETCH_ASSOC);
$product = array();
$product["RegNo"] = $stmt["RegNo"];
$product["UserName"] = $stmt["UserName"];
$product["password"] = $stmt["password"];
// success
$result["success"] = 1;
// user node
$result["product"] = array();
array_push($result["product"], $product);
// echoing JSON response
echo json_encode($result);
} else {
// no product found
$result["success"] = 0;
$result["message"] = "No product found";
// echo no users JSON
echo json_encode($result);
}
//sqlsrv_free_stmt($stmt);
sqlsrv_close($conn); //Close the connnection first
}
}
?>
I have connected to MS SQL Server to PHP File.if condition work properly but else part is not work.I have wrong parameter passed its give output
{"success":1,"product":[{"RegNo":null,"UserName":null,"password":null}]}.
but right else part output is
{
"success": 0,
"message": "No product found"
}

Answer 1

After
$stmt = sqlsrv_query($conn, $sql);
$stmt is either FALSE (when there is a connectivity issue, a syntax error in the query or it refers an object that doesn't exist) or a PHP resource.
Because $stmt is neither an array nor an object that implements the Countable interface, count($stmt) always returns 1.
Use sqlsrv_num_rows() to get the number of rows returned by the query or (if you don't care about the number) use sqlsrv_has_rows():
$stmt = sqlsrv_query($conn, $sql);
if ($stmt) {
if (sqlsrv_has_rows($stmt) > 0) {
$row = sqlsrv_fetch_array($stmt, SQLSRV_FETCH_ASSOC);
$product = array(
'RegNo' => $row['RegNo'],
'UserName' => $row['UserName'],
'password' => $row['password'],
);
$result = array(
'success' => 1,
'product' => array($product),
);
} else {
// no product found
$result = array(
'success' => 0,
'message' => 'No product found',
);
}
echo json_encode($result);
}
sqlsrv_free_stmt($stmt);
sqlsrv_close($conn);