Restrict all site access to a specific IP address

November 9, 2020

This post brought to you by RocketGeek, ButlerBlog, and the following:

add_action( 'init', function() {
    $ip = ( ! empty( $_SERVER['HTTP_CLIENT_IP'] ) ) ? $_SERVER['HTTP_CLIENT_IP'] : $_SERVER['REMOTE_ADDR'];
    if ( '111.111.111.111' != $ip ) {
        die();
    }
});

Chad Butler