ncserny

# Redirect "olddomain.com/..." to "newdomain.com/..." URLs at the cache level.
# Just set an error code (in our case 750) in vcl_recv when accessing old urls, then define the redirect in vcl_error.
# Tested with Varnish 3.X

sub vcl_recv {
  # Set error code when accessing an old url.
  if (req.http.host ~ "^(www\.)?olddomain\.com$") {
    error 750;
  }
}

ncserny

# Backend Server
backend default {
	.host = "XXX.XXX.XXX.XXX"; # IP Address of your Web Server
	.port = "80"; # Port of your Web Server
}

# Hosts allowed to purge Varnish
acl purge {
	"localhost"; # Allow varnish to be purged from the same server it is running on
	"XXX.XXX.XXX.XXX"/24; # IP of your web server that is allowed to purge the cache

ncserny

<?php 
add_filter('pre_get_posts', 'instant_articles_query_modified', 10, 2);
function instant_articles_query_modified($query) {
    if ($query->is_main_query() && null !== INSTANT_ARTICLES_SLUG && $query->is_feed(INSTANT_ARTICLES_SLUG)) {
        $query->set('cat', 1,2);
    }
}
?>

ncserny

<?php
// remove extra tags above the feed which comes from other plugins.
add_action('wp_footer', 'remove_extra_code_above_feed', 9);   // 9 because by default above plugin functions executes at 10 priority.
function remove_extra_code_above_feed()
{
    if (is_feed()) {
        // removing these methods because they are generating extra content before the Facebook IA feed.
        remove_filter('wp_footer', 'gdlr_additional_script');
        remove_filter('wp_footer', 'an_prepare');
        remove_filter('wp_footer', 'cookielawinfo_inject_cli_script');

ncserny

<?php
// Sanitizing / replace the table shortcode with the table before the post gets transformed to IA.
add_action('instant_articles_before_transform_post', function () {
    add_filter('the_content', 'sanitize_content_for_ia');
});

function sanitize_content_for_ia($content) {
    if (in_category(array('videos', 'mehrseitig'))) {
        $content = preg_replace('@\[sam id=.*?\]@', '', $content);      // sam id repalcement