rename PagewordIndex to FulltextIndex

trigger error when lock/unlock index directory failed

histogram() change args order

INdexer::histogram() is only used in indexer_histogram.test.php file.

fix typo

change wordlen() to non-static method

use Indexer.php instead of PageIndex.php

dispatch indexing request to addPage() or deletePage()

refactor getPID()

getPID() : mark deleted page entry in page.idx
getPIDNoLock() : obsoleted
getPages() : exclude deleted pages

claer() idx files only created by index class

define getPages() in AbstractIndex instead of PageIndex

getPages() is inherited to each subclass of AbstractIndex, but MetadataIndex::getPages() will override the inherited method.

restore accessibility protected for getIndexWords()

separate Tokenizer class

remove Undefined method dispacher for _test

move lookup() to PagewordIndex class, reduce term 'Indexer'

make similar MetadataIndex::lookupKey() and PagewordIndex::lookup()

resolve conflictions, CodeSniffer errors

cast int for addIndexKey()

Does it solve scrutinizer inspection?
The expression ``$this->addIndexKey('page', '', $page);`` of type ``false|integer|string`` adds the type ``string`` to the return on

cast int for addIndexKey()

Does it solve scrutinizer inspection?
The expression ``$this->addIndexKey('page', '', $page);`` of type ``false|integer|string`` adds the type ``string`` to the return on line 73 which is incompatible with the return type documented by ``dokuwiki\Search\AbstractIndex::getPID`` of type ``integer|false``.

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rewrite deprecated ft_* functions

remove getInstance() from AbstractIndex

fix $errors static

fix Undefined methods dispatcher

Undefined methods dispatcher

prepared for unit tests compatibility only

define histogram() in PageIndex class

allow public access to getIndex(), etc.

obsolete deletePageNoLock()

separate deletePageNoLock() process