Cambio de contraseña con verificación de contraseña anterior en WordPress

jpb_change_user_pass

<?php

function jpb_change_user_pass() {

	$old_pass = filter_input(INPUT_POST, 'old_pass');
	$new_pass = filter_input(INPUT_POST, 'new_pass');
	$new_pass_verify = filter_input(INPUT_POST, 'new_pass_verify');

	if (empty($old_pass) or empty($new_pass) or $new_pass != $new_pass_verify or !is_user_logged_in()) {
		return;
	}

	global $current_user;
	get_currentuserinfo();
	
	if (empty($current_user)) {
		return;
	}

	$creds = array();
	$creds['user_login'] = $current_user->user_login;
	$creds['user_password'] = $old_pass;
	$user = wp_signon($creds, false);

	if (is_wp_error($user)) {
		// Do something if $old pass is incorrect
	} else {
		// Update pass
		wp_update_user(array('ID' => $current_user->ID, 'user_pass' => $new_pass));
	}
}

jpb_change_user_pass_form

<form action="" method="post">
	
	<label for="old_pass">old_pass</label>
	<input type="password" name="old_pass" id="old_pass">
	
	<label for="new_pass">new_pass</label>
	<input type="password" name="new_pass" id="new_pass">
	
	<label for="new_pass_verify">new_pass_verify</label>
	<input type="password" name="new_pass_verify" id="new_pass_verify">
	
	<input type="submit">
</form>