maybe_add_existing_user_to_blog()

2170function maybe_add_existing_user_to_blog() {2171	if ( ! str_contains( $_SERVER['REQUEST_URI'], '/newbloguser/' ) ) {2172		return;2173	}2174 2175	$parts = explode( '/', $_SERVER['REQUEST_URI'] );2176	$key   = array_pop( $parts );2177 2178	if ( '' === $key ) {2179		$key = array_pop( $parts );2180	}2181 2182	$details = get_option( 'new_user_' . $key );2183	if ( ! empty( $details ) ) {2184		delete_option( 'new_user_' . $key );2185	}2186 2187	if ( empty( $details ) || is_wp_error( add_existing_user_to_blog( $details ) ) ) {2188		wp_die(2189			sprintf(2190				/* translators: %s: Home URL. */2191				__( 'An error occurred adding you to this site. Go to the <a href="%s">homepage</a>.' ),2192				home_url()2193			)2194		);2195	}2196 2197	wp_die(2198		sprintf(2199			/* translators: 1: Home URL, 2: Admin URL. */2200			__( 'You have been added to this site. Please visit the <a href="%1$s">homepage</a> or <a href="%2$s">log in</a> using your username and password.' ),2201			home_url(),2202			admin_url()2203		),2204		__( 'WordPress &rsaquo; Success' ),2205		array( 'response' => 200 )2206	);2207}