How to change the permalink structure of a master page?

Question

Links on the page I use are progressing as follows: http://example.com/image/1

The code I use for Functions.php

add_action( 'init', 'wpse316713_pagination_base_rewrite_rule' );
function wpse316713_pagination_base_rewrite_rule() {
    global $wp_rewrite;
    $wp_rewrite->pagination_base = 'image';
}

Reference link: How to change the link structure of the homepage?

What I'm trying to do is remove the "image" base. How can we change it to http://example.com/1?

Note:

 $wp_rewrite->pagination_base = 'image';

If I remove the word "image" here, it's double flip. " // " shaped. This leads to an inability to display the page. Going like http://example.com/image/2/1. How can we completely remove it and return it to only 1?

Answer 1

To remove pagination prefix page in home page you should:

• add a rewrite rule which will translate the new link format,
• prevent redirection to address containing page,
• replace URLs in paging links.

By creating pagination links, WordPress appends query var paged with mentioned prefix to url. Therefore, without modification, the links would look like example.com/3/page/3.

Next thing is redirection. WP redirects incoming links to the proper URL based on the site url.Thanks to our rewrite rule, for the example.com/3 url, the results of the third page will be displayed (paged=3). But WP check that correct url for paged=3 should be example.com/3/page/3 which is different from example.com/3. Therefore, a redirection will be made.

add_action( 'init', 'se323035_structure', 25 );
add_filter( 'paginate_links',       'se323035_paginate_links' );
add_filter( 'redirect_canonical',   'se323035_redirect_canonical', 20, 2 );

function se323035_structure()
{
    global $wp_rewrite;
    if ( $wp_rewrite->using_permalinks() )
        add_rewrite_rule( '([0-9]+)/?$', 'index.php?&paged=$matches[1]', 'top');
}

function se323035_paginate_links( $link )
{
    global $wp_rewrite;
    if ( is_home() && $wp_rewrite->using_permalinks() ) {
        $original = @parse_url( $link );
        $home = @parse_url( home_url('/') );
        if ( ! isset( $original['path'] ) )
            $original['path'] = '';

        $original_path = $original['path'];
        $original_path_end = $original['path'];
        if ( isset($home['path']) )
        {
            $home['path'] = trim($home['path']);
            $home['path'] = untrailingslashit($home['path']);
            if ( !empty($home['path']) && $home['path'] != '/' )
                $original_path_end = str_replace( $home['path'], '', $original['path']);
        }
        //
        // if original url match to our link structure do not redirect to '/page/{number}'
        if ( preg_match( '|^/?[0-9]+/?$|', $original_path_end) ) {
            $link = home_url( '/' );
        }
        elseif ( preg_match( "|/(\d+/)?$wp_rewrite->pagination_base/\d+/?$|", $original_path_end) )
            $link = preg_replace( "|/(\d+/)?$wp_rewrite->pagination_base/(\d+/?)$|", '/${2}', $link );
    }

    return $link;
}

function se323035_redirect_canonical( $redirect_url, $requested_url )
{
    global $wp_rewrite;

    if ( is_home() && !empty($redirect_url) )
    {
        $original = @parse_url( $requested_url );
        if ( ! isset( $original['path'] ) )
            $original['path'] = '';

        $original_path = $original['path'];
        $home = @parse_url( home_url('/') );
        if ( isset($home['path']) )
        {
            $home['path'] = trim($home['path']);
            $home['path'] = untrailingslashit($home['path']);
            if ( !empty($home['path']) && $home['path'] != '/' )
                $original_path = str_replace( $home['path'], '', $original['path']);
        }
        // if original url match to our link structure don't redirect to '/page/{number}'
        if ( preg_match( '|^/?[0-9]+/?$|', $original_path) )
            return '';
    }
    return $redirect_url;
}

The new link format can not be used if the permalink structure is set to /%post_id%.