问没有错误，但没有‘操作’

EN

    <?php
    {
include_once 'mysqlconnect.php';
include_once 'functions.php';


$error = $user = $pass = "";

    $query = "SELECT user,pass FROM password
              WHERE user='$user' AND pass='$pass'";

    if (mysqli_num_rows(queryMysqli($query)) == 0)
    {
        $error = "Username/Password invalid<br />";
    }
    else
    {

        echo ("You are now logged in. Please
           <a href='C:\xampp/htdocs//xxxx/xxxc_member.php?view=$user'>click here</a>.");
    }
    }
    ?>
     <form action='valid.php' method='POST'> 

 <fieldset>         

    <legend>Enter a password and email address</legend>

        <p>Password : <input type='password' name='pass'></p> 
        <p>Email Address : <input type='text' name='user'></p> 

</fieldset>

<p><input type='submit' ></p> 

    </form>

    function querymysqli($query)
    {
    $con = @mysqli_connect('localhost', 'xxxxxx', '', 'xxxxxx');
    {
$result = mysqli_query($con, $query) or die(mysqli_error());
return $result;
    }
    }