home_url on IIS missing permalink index.php

Question

I'm using IIS without any URL re-writing that include an index.php at the end. The custom permalink structure is: /index.php/%year%/%monthnum%/%postname%/

The problem is that the home_url function doesn't include the index.php, so if I want to refer to a custom page <?php echo home_url() . '/my-page/'; ?> returns http://domain.com/my-page/ but what I need is http://domain.com/index.php/my-page/ .

Is there a WordPress function that will include the index.php or do I have to put in a custom bit of code?

N.B. I've tried Googling, but most links point to re-writing the URL which is not what I want.

Answer 1

You can filter home_url:

add_filter( 'home_url', 'wpse102523_home_url' );
function wpse102523_home_url( $url ) {
    return $url . 'index.php/';
}

Reference: Adam Brown's Filter Database

Answer 2

Trying the add_filter option didn't actually work for me. The code gets quite ugly as the home_url function was impacting permalinks which have index.php and all my attempts to get it working failed.

The best solution I came up with was to modify the Site Address (aka home_url) in General Settings to be http://domain.com/index.php. Then change the permalinks to be normal e.g. /%year%/%monthnum%/%postname%/. This then gets most links working. The only problem link is http://domain.com/index.php/ (note the end '/'). For me this doesn't matter as its my localhost site, but otherwise just fix that case and the site should work fine.

Just incase any one does want to carry on going down the add_filter route, here for my sins is my attempt:

<?php
if ($is_iis7 && !iis7_supports_permalinks()) {
    if (!is_admin()) {
        add_filter( 'home_url', 'icc_iispb_url' );
    }
}

function icc_iispb_url($url) {
    if (strpos($url, 'index.php') === false) {
        $url = str_replace(get_option('home'), get_option('home').'/index.php', $url);
    }
    return $url;
}   
?>