wp_login_url()

wp_login_url( string $redirect = '', bool $force_reauth = false ): string

function wp_login_url( $redirect = '', $force_reauth = false ) {
	$login_url = site_url( 'wp-login.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 );
	}

	/**
	 * Filters the login URL.
	 *
	 * @since 2.8.0
	 * @since 4.2.0 The `$force_reauth` parameter was added.
	 *
	 * @param string $login_url    The login URL. Not HTML-encoded.
	 * @param string $redirect     The path to redirect to on login, if supplied.
	 * @param bool   $force_reauth Whether to force reauthorization, even if a cookie is present.
	 */
	return apply_filters( 'login_url', $login_url, $redirect, $force_reauth );
}