Words with '&' sign not found

add_filter('relevanssi_remove_punctuation', 'saveampersands_1', 9);
function saveampersands_1($a) {
    $a = str_replace('&', 'AMPERSAND', $a);
    return $a;
}

add_filter('relevanssi_remove_punctuation', 'saveampersands_2', 11);
function saveampersands_2($a) {
    $a = str_replace('AMPERSAND', '&' $a);
    return $a;
}

Add this to your functions.php and reindex the database.

Thanks for your response Mikko! Could you maybe tell me where to place this exactly in the functions.php? I copy-pasted it after the last rule that was in there and it broke my site. I placed back the back up file but now I don’t want to try again and paste it somewhere else.

Thanks in advance!

Anywhere, really, but if you have a ?> in the end of the functions.php, it has to go before that, as that signifies the end of PHP code.

Also, I noticed there’s a typo in the code, might be that as well. It was missing a comma, and the correct code is:

add_filter('relevanssi_remove_punctuation', 'saveampersands_1', 9);
function saveampersands_1($a) {
    $a = str_replace('&', 'AMPERSAND', $a);
    return $a;
}

add_filter('relevanssi_remove_punctuation', 'saveampersands_2', 11);
function saveampersands_2($a) {
    $a = str_replace('AMPERSAND', '&', $a);
    return $a;
}

It still doesn’t work. When I search for ‘H&M’ now, I still don’t get search results. If I look at the url of the search result I see: https://www.stylediscount.nl/?s=h%26m, so there might still be some error in that code?

Did you reindex the database after adding the code? It doesn’t work unless you do that. The URL is correct, & appears in urls as %26 so that’s just as expected.