if ( 'POST' == $_SERVER['REQUEST_METHOD'] && !empty( $_POST['action'] ) && $_POST['action'] == 'log-in' ) :
    global $error;
    $login = wp_login( $_POST['user-name'], $_POST['password'] );
    $login = wp_signon( array( 'user_login' => $_POST['user-name'], 'user_password' => $_POST['password'], 'remember' => $_POST['remember-me'] ), false );

    if (!$error) {
        save_message( 'success', __( 'You have successfully Login.', 'frontendprofile' ) );
        unset($_POST);
        wp_redirect( get_permalink( 4 ) );
    }
    // wp_redirect( home_url() );
endif;

<?php
if ( 'POST' == $_SERVER['REQUEST_METHOD'] && !empty( $_POST['action'] ) &&  $_POST['action'] == 'log-in' ) :

$login = wp_signon( array( 'user_login' => $_POST['user-name'], 'user_password' => $_POST['password'], 'remember' => $_POST['remember-me'] ), false );

if ( !is_wp_error($login) ){
save_message( 'success', __( 'You have successfully Login.', 'frontendprofile' ) );
unset($_POST);
wp_redirect( get_permalink( 4 ) );
}

endif;
?>

<?php
function parse_user($info = null, $return = 'object') {
    if ( is_null( $info ) ) {
        global $current_user;
        if ( empty( $current_user->ID ) ) return null;
        $info = get_userdata( $current_user->ID );
    }
    elseif ( empty( $info ) ) {
        return null;
    }
    if( $return == 'ID' ) {
        if ( is_object( $info ) ) return $info->ID;
        if ( is_numeric( $info ) ) return $info;
    }
    elseif( $return == 'object' ) {
        if ( is_object( $info ) && $info->ID) return $info;
        if ( is_object( $info )) return get_userdata( $info->ID );
        if ( is_numeric( $info ) ) return get_userdata( $info );
        if ( is_string( $info ) ) return get_userdatabylogin( $info );
    }
    else {
        return null;
    }
}

function wp_login_user_po9856($username, $password, $remember) {
    // Get the user based on the username from the POST
    $user = parse_user($username);

    // Remove html tags from the variables
    $username = strip_tags($username);
    $password = strip_tags($password);

    // Validate the Form Data
    if(!wp_check_password( $password_stripped, $user->user_pass ) ) return new WP_Error('incorrect_password', "Wrong Password!");

    // User login
    $login = wp_signon(array('user_login' => $username, 'user_password' => $password, 'remember' => (bool)$remember));
    if (is_wp_error($login))
        return $login;

    // Unset
    unset($_POST);

    // Custom Message
    save_message( 'success', __( 'You have successfully Login.', 'frontendprofile' ) );

    // Redirection
    wp_redirect(get_permalink( 4 ));
}
if ( 'POST' == $_SERVER['REQUEST_METHOD'] && @$_POST['action'] == 'log-in')
{
    wp_login_user_po9856($_POST['user-name'], $_POST['password'], $_POST['remember-me']);
}