警告：mysqli_query（）要求参数1为mysqli，第32行/home/a7874248/public_html/login.php中给出的资源
如何解决？
<!doctype html>
<html>
<head>
<meta charset="UTF-8">
<title>Untitled Document</title>
</head>
<body>
<?php
if(isset ($_POST['submit']))
{
$user = $_POST['user'];
$pass = $_POST['password'];
$server = "mysql1.000webhost.com";
$username = "a7874248_root";
$password = "****";
$database = "a7874248_forum";
$db_handle = mysql_connect($server, $username, $password, $database) or die("Could not connect to database!");
$db_found = mysql_select_db($database, $db_handle);
if ($db_found) {
$sql = "SELECT * FROM users where username='$user' AND password = SHA1($pass)";
$QueryResult = mysqli_query ($db_handle, $sql); // Run the query.
if ($QueryResult === FALSE)
echo "<p>Wrong username or password</p>";
else
{
。 。 。 。 。