Remove check for deprecated E_STRICT

mark nullable types explicitly

PHP 8.4 will throw a warning where type hints without a ?prefix are used
and nullable parameters can be passed.

I'm not sure if I found all occurances, but we still r

mark nullable types explicitly

PHP 8.4 will throw a warning where type hints without a ?prefix are used
and nullable parameters can be passed.

I'm not sure if I found all occurances, but we still rarely use type
hints, so it might not be many indeed.

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remove deprecated code

This removes code that has been marked as deprecated before 2020.

replace deprecated utf8_encode #4354

test on PHP 8.4

fix error on phrase search with no results. fixes #4355

When no pages for a phrase can be found, eg. because the index is still
empty, end($stack) returns false instead of an array, breaking the
fol

fix error on phrase search with no results. fixes #4355

When no pages for a phrase can be found, eg. because the index is still
empty, end($stack) returns false instead of an array, breaking the
following loop.

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Fix PHP error while saving Aichat settings

Fix MD5 hash calculation tests

Fix MD5 hash calculation

Fix mismatch between search_allpages (local) and core.listPages (XMLRPC) API call hash calculation.

translation update

Time markup for Last Changed field

This adds semantic markup to the "last change" date in the article footer. This change should not have any impact on the rendering of the page.

change use order for codesniffer happyness

Update SECURITY.md - huntr is dead

�� Rector and PHPCS fixes

ignore codesniffer on override method

Replace strftime with Intl ICU. Fixes #3573

This uses a class that maps strftime placeholders to the appropriate ICU
patterns. I am using the fallback-intl branch here which provides an
English-only

Replace strftime with Intl ICU. Fixes #3573

This uses a class that maps strftime placeholders to the appropriate ICU
patterns. I am using the fallback-intl branch here which provides an
English-only fallback when the intl extension is not available.

Core has only two places where strftime is used: dformat() and the
SimplePie feed parser. Both are adjusted with this patch. For the latter
a custom Item class had to be registered. For better separation all our
FeedParser classes have been moved to the Feed namespace where our
FeedCreator classes already reside.

Note that this will currently be a degration for users without intl as
it will fall back to date and not to the still available strftime.

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updated composer depedencies

LinkWizard: fix multilevel parents in references

use relative links in LinkWizard

When the linked page has a common prefix with the current page,
construct a relative link instead of always inserting absolute links.

LinkWizard: add method to create a relative link

This is not used, yet. Usage will be added in a future commit.

Since we don't have a proper testing framework in place, yet. Tests have
been added a

LinkWizard: add method to create a relative link

This is not used, yet. Usage will be added in a future commit.

Since we don't have a proper testing framework in place, yet. Tests have
been added as a standalone script that can be run manually.

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doc blocks in link wizard

Linkwizard: use strict comparisons

LinkWizard: don't use the deprecated keycode property anymore

turn link wizard into a class

Basic modernisation of the link wizard to more modern JavaScript.

translation update