languages/classes/LanguageTr.php

   1 <?php
   2 /**
   3  * Turkish (Türkçe) specific code.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup Language
  22  */
  23
  24 /**
  25  * Turkish (Türkçe)
  26  *
  27  * The Turkish language, like other Turkic languages, distinguishes
  28  * a dotted letter 'i' from a dotless letter 'ı' (U+0131 LATIN SMALL LETTER DOTLESS I).
  29  * In these languages, each has an equivalent uppercase mapping:
  30  * ı (U+0131 LATIN SMALL LETTER DOTLESS I) -> I (U+0049 LATIN CAPITAL LETTER I),
  31  * i (U+0069 LATIN SMALL LETTER I) -> İ (U+0130 LATIN CAPITAL LETTER I WITH DOT ABOVE).
  32  *
  33  * Unicode CaseFolding.txt defines this case as type 'T', a special case for Turkic languages:
  34  * tr and az. PHP 7.3 parser ignores this special cases. so we have to override the
  35  * ucfirst and lcfirst methods.
  36  *
  37  * See https://en.wikipedia.org/wiki/Dotted_and_dotless_I and T30040
  38  * @ingroup Language
  39  */
  40 class LanguageTr extends Language {
  41
  42         private $uc = [ 'I', 'İ' ];
  43         private $lc = [ 'ı', 'i' ];
  44
  45         /**
  46          * @param string $string
  47          * @return string
  48          */
  49         public function ucfirst( $string ) {
  50                 $first = mb_substr( $string, 0, 1 );
  51                 if ( in_array( $first, $this->lc ) ) {
  52                         $first = str_replace( $this->lc, $this->uc, $first );
  53                         return $first . mb_substr( $string, 1 );
  54                 }
  55                 return parent::ucfirst( $string );
  56         }
  57
  58         /**
  59          * @param string $string
  60          * @return mixed|string
  61          */
  62         function lcfirst( $string ) {
  63                 $first = mb_substr( $string, 0, 1 );
  64                 if ( in_array( $first, $this->uc ) ) {
  65                         $first = str_replace( $this->uc, $this->lc, $first );
  66                         return $first . mb_substr( $string, 1 );
  67                 }
  68                 return parent::lcfirst( $string );
  69         }
  70
  71 }