Unable to perform case-insensitive ordering of a collection when the order is based on a custom header field.

[parcand]

The $sort_flags parameter is always set to SORT_REGULAR when ordering a collection based on a custom header field.

This is quite problematic since there are many situations where data is expected to be sorted case-insensitively.

Adding an optional sort_flags parameter to the order method of the Grav\Common\Page\Collection class could help solve that issue.

[flaviocopes]

Ok I've done a bit of research into this, and came up with this PR #1173

The thing to note is this: If the intl PHP extension is loaded, only these flags are available:
https://secure.php.net/manual/en/collator.asort.php as we use PHP's Collator class to sort.

Otherwise, if intl is not loaded, you can use the PHP standard sorting flags (https://secure.php.net/manual/en/array.constants.php) and add

content:
    ....
    order:
        by: header.title
        sort_flags:
            - SORT_NATURAL
            - SORT_FLAG_CASE

to order case insensitive.

[parcand]

Wow, that was fast, and your solution is great. Thanks a lot!

[rhukster]

Also we are going to improve collections in Grav 2.0