Android - Cotejar passwords

<?php

include ('conexion.php');

include ('wp-includes/array2json.php');

include ("wp-load.php");

/*include ("wp-includes/user.php");

include ("wp-includes/formatting.php");

include ("wp-includes/plugin.php");

include ("wp-includes/pluggable.php");

include ("wp-includes/class-wp-user.php");

include ("wp-includes/cache.php");*/

include ("wp-blog-header.php");

$email=$_GET['email'];

$pass=$_GET['password'];

$sql="SELECT display_name,user_pass,user_email FROM wp_users WHERE user_email ='".$email."';";

$result = $mysqli -> query($sql);

// $user = get_user_by( 'user_email', $email );

while ($fila=$result->fetch_assoc()) {

	$usu=array(

		'email' => $fila['user_email'],

		'password' => $fila['user_pass']

	);

if ( ! wp_check_password( $pass, $usu('user_pass'), $usu['ID'] ) ) {

	echo 'password correcta <br>';

}

else {

	echo 'password incorrecta <br>';

}

}