add dbg_deprecated()

update metadata of changed page in PageFile class

fix typo

PHP8: check array key existence

remove page key from event data prior to return

$data['page'] is object $this, it is not possible to access the object after destructed.

fix Undefined variable $id

implement PageFile class

PageFile class handles wiki text file and its change management for specific page, main part comes from `function saveWikiText()`. This ensures and enables to use one **Pag

implement PageFile class

PageFile class handles wiki text file and its change management for specific page, main part comes from `function saveWikiText()`. This ensures and enables to use one **PageChangeLog** instance during a page save process among class methods and relevant plugins.

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remove goto-loop structure

plugin event handler should set correct changeType.

set current revision date 1sec before now for external deletion

in preparation for possible new page save

translation update

update saveWikiText()

allow plugin that provides alternative policy for handling external edits in changelog

rigorous COMMON_WIKIPAGE_SAVE

ignore wrong changes in id and file data caused by event handlers

use time() for revision date of externally deleted page

also, code doc updates

rename saveRevisionInfo to cacheRevisionInfo

move hasRevision() to trait

fix fallback implementation for resolve_pageid()

When an empty link was given, the old implementation fell back to $ID,
this was handled incorrectly in the deprecated method.

simplify relative resolver and add tests

make resolveStartPage easier to understand

This dosn't really change the behaviour but makes the code easier to
grasp. A simple unit test has been added.

Update Ajax.php

linkwiz update

ChangeLogTrait

- move ChangeLog low level methods into trait
- static ChangeLog::parseLogLine() replaces parseChangeLogLine()
- new ChangeLog::buildLogLine()

translation update

new method ChangeLog::addLogEntry()

rewrite `detectExternalEdit()` in inc/common.php

change wrongly older mtime of current page than last revision

use false for unknown timestamp instead of 'unknown'