Disable “similar permalink” redirect [duplicate]

To completely disable this feature, use this code, which I got from here.

remove_action( 'template_redirect', 'redirect_canonical' );

To only disable it for URL addresses that contain the string ‘event’, use this code:

add_filter( 'redirect_canonical', 'disable_redirect_canonical_for_event', 2, 10 );

function disable_redirect_canonical_for_event( $redirect_url, $requested_url ) {
    if ( strpos( $requested_url, 'event' ) !== false ) {
        return false;
    }
    return $redirect_url;
}