Wordpress override login, logout urls and remove wp login php

functions.php

//Cop wp-login.php into any_login_admin_page.php
//then delete wp-login.php
//then write this...
add_filter('login_url', function($login_url, $redirect = '', $force_reauth = false) {
	$login_url = site_url( '/any_login_admin_page.php', 'login' );
	if ( ! empty( $redirect ) ) {
		$login_url = add_query_arg( 'redirect_to', urlencode( $redirect ), $login_url );
	}
	if ( $force_reauth ) {
		$login_url = add_query_arg( 'reauth', '1', $login_url );
	}

	return $login_url;
});

add_filter('logout_url', function($logout_url, $redirect = '') {
	$args = array( 'action' => 'logout' );
	$args['redirect_to'] = urlencode( '/' );

	$logout_url = add_query_arg($args, site_url( '/any_login_admin_page.php', 'login' ));
	$logout_url = wp_nonce_url( $logout_url, 'log-out' );

	return $logout_url;
});
//close redirect wp-admin to login page
add_filter('nocache_headers', function() {
	if(strpos($_SERVER['REQUEST_URI'], '/wp-admin') === 0 && !is_user_logged_in()) {
		header("HTTP/1.0 404 Not Found");
		get_template_part( 404 );
		exit();
	}
});