Parse error: syntax error, unexpected T_OBJECT_OPERATOR in F:\www\study\authmain.php on line<?php
session_start();if (isset($_POST['userid']) && isset($_POST['password']))
{
$userid=$_POST['userid'];
$password=$_POST['password'];

$db_conn=new mysqli('localhost','webauth','webauth','auth');
if (mysqli_connect_errno()) {
echo 'Connection to database failed:'.mysqli_connect_error();
exit();

}

$query='Select * from authorized_users where name='. $userid." and password=sha1('$password')";
$result=$db_conn->query($query);
if ($result->num_rows)
{
$_SESSION['valid_user']=$userid;
}

$db_conn->close();
}
?>mysqli对象数据库