Show a different link based on IP

Question

We provide access to several databases from within the our library, but outside our library users need to go through a verification step. As such we have a different link for some IPs (eg on our network/not on our network).

Using PHP we are able to serve the appropriate link, but as far as I know WP doesn't have a native way to serve different links depending on the users' IP. However we have several links in the CMS portion of our website which is powered by WP. Is there a way in WP to serve different links based on IP?

Answer 1

Yes, use a shortcode:

function aslums_first_shortcode( $atts, $content ) {
    if ( IS INSIDE NETWORK? CHECK ) {
        return 'inside the network'.$content;
    }
    return 'outside the network'.$content;
}
add_shortcode( 'aslums_shortcode', 'aslums_first_shortcode' );

In your post content:

You are: [aslums_shortcode]

As an aside, could a user outside your network bypass verification if they knew what the URL users inside the network are using? You may want to reconsider how authentication works on your network