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<?php |
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|
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/* |
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* This file is part of the Symfony package. |
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* |
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* (c) Fabien Potencier <fabien@symfony.com> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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|
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namespace Symfony\Component\String\Inflector; |
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|
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final class EnglishInflector implements InflectorInterface |
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{ |
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/** |
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* Map English plural to singular suffixes. |
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* |
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* @see http://english-zone.com/spelling/plurals.html |
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*/ |
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private const PLURAL_MAP = [ |
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// First entry: plural suffix, reversed |
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// Second entry: length of plural suffix |
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// Third entry: Whether the suffix may succeed a vocal |
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// Fourth entry: Whether the suffix may succeed a consonant |
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// Fifth entry: singular suffix, normal |
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|
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// bacteria (bacterium), criteria (criterion), phenomena (phenomenon) |
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['a', 1, true, true, ['on', 'um']], |
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|
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// nebulae (nebula) |
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['ea', 2, true, true, 'a'], |
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|
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// services (service) |
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['secivres', 8, true, true, 'service'], |
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|
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// mice (mouse), lice (louse) |
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['eci', 3, false, true, 'ouse'], |
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|
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// geese (goose) |
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['esee', 4, false, true, 'oose'], |
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|
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// fungi (fungus), alumni (alumnus), syllabi (syllabus), radii (radius) |
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['i', 1, true, true, 'us'], |
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|
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// men (man), women (woman) |
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['nem', 3, true, true, 'man'], |
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|
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// children (child) |
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['nerdlihc', 8, true, true, 'child'], |
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|
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// oxen (ox) |
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['nexo', 4, false, false, 'ox'], |
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|
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// indices (index), appendices (appendix), prices (price) |
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['seci', 4, false, true, ['ex', 'ix', 'ice']], |
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|
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// selfies (selfie) |
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['seifles', 7, true, true, 'selfie'], |
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|
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// zombies (zombie) |
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['seibmoz', 7, true, true, 'zombie'], |
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|
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// movies (movie) |
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['seivom', 6, true, true, 'movie'], |
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|
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// conspectuses (conspectus), prospectuses (prospectus) |
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['sesutcep', 8, true, true, 'pectus'], |
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|
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// feet (foot) |
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['teef', 4, true, true, 'foot'], |
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|
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// geese (goose) |
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['eseeg', 5, true, true, 'goose'], |
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|
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// teeth (tooth) |
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['hteet', 5, true, true, 'tooth'], |
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|
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// news (news) |
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['swen', 4, true, true, 'news'], |
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|
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// series (series) |
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['seires', 6, true, true, 'series'], |
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|
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// babies (baby) |
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['sei', 3, false, true, 'y'], |
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|
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// accesses (access), addresses (address), kisses (kiss) |
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['sess', 4, true, false, 'ss'], |
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|
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// analyses (analysis), ellipses (ellipsis), fungi (fungus), |
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// neuroses (neurosis), theses (thesis), emphases (emphasis), |
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// oases (oasis), crises (crisis), houses (house), bases (base), |
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// atlases (atlas) |
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['ses', 3, true, true, ['s', 'se', 'sis']], |
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|
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// objectives (objective), alternative (alternatives) |
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['sevit', 5, true, true, 'tive'], |
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|
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// drives (drive) |
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['sevird', 6, false, true, 'drive'], |
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|
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// lives (life), wives (wife) |
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['sevi', 4, false, true, 'ife'], |
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|
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// moves (move) |
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['sevom', 5, true, true, 'move'], |
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|
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// hooves (hoof), dwarves (dwarf), elves (elf), leaves (leaf), caves (cave), staves (staff) |
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['sev', 3, true, true, ['f', 've', 'ff']], |
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|
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// axes (axis), axes (ax), axes (axe) |
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['sexa', 4, false, false, ['ax', 'axe', 'axis']], |
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|
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// indexes (index), matrixes (matrix) |
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['sex', 3, true, false, 'x'], |
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|
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// quizzes (quiz) |
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['sezz', 4, true, false, 'z'], |
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|
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// bureaus (bureau) |
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['suae', 4, false, true, 'eau'], |
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|
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// fees (fee), trees (tree), employees (employee) |
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['see', 3, true, true, 'ee'], |
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|
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// edges (edge) |
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['segd', 4, true, true, 'dge'], |
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|
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// roses (rose), garages (garage), cassettes (cassette), |
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// waltzes (waltz), heroes (hero), bushes (bush), arches (arch), |
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// shoes (shoe) |
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['se', 2, true, true, ['', 'e']], |
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|
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// tags (tag) |
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['s', 1, true, true, ''], |
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|
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// chateaux (chateau) |
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['xuae', 4, false, true, 'eau'], |
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|
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// people (person) |
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['elpoep', 6, true, true, 'person'], |
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]; |
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|
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/** |
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* Map English singular to plural suffixes. |
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* |
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* @see http://english-zone.com/spelling/plurals.html |
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*/ |
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private const SINGULAR_MAP = [ |
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// First entry: singular suffix, reversed |
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// Second entry: length of singular suffix |
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// Third entry: Whether the suffix may succeed a vocal |
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// Fourth entry: Whether the suffix may succeed a consonant |
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// Fifth entry: plural suffix, normal |
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|
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// criterion (criteria) |
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['airetirc', 8, false, false, 'criterion'], |
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|
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// nebulae (nebula) |
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['aluben', 6, false, false, 'nebulae'], |
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|
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// children (child) |
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['dlihc', 5, true, true, 'children'], |
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|
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// prices (price) |
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['eci', 3, false, true, 'ices'], |
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|
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// services (service) |
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['ecivres', 7, true, true, 'services'], |
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|
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// lives (life), wives (wife) |
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['efi', 3, false, true, 'ives'], |
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|
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// selfies (selfie) |
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['eifles', 6, true, true, 'selfies'], |
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|
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// movies (movie) |
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['eivom', 5, true, true, 'movies'], |
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|
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// lice (louse) |
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['esuol', 5, false, true, 'lice'], |
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|
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// mice (mouse) |
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['esuom', 5, false, true, 'mice'], |
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|
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// geese (goose) |
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['esoo', 4, false, true, 'eese'], |
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|
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// houses (house), bases (base) |
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['es', 2, true, true, 'ses'], |
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|
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// geese (goose) |
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['esoog', 5, true, true, 'geese'], |
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|
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// caves (cave) |
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['ev', 2, true, true, 'ves'], |
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|
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// drives (drive) |
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['evird', 5, false, true, 'drives'], |
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|
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// objectives (objective), alternative (alternatives) |
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['evit', 4, true, true, 'tives'], |
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|
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// moves (move) |
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['evom', 4, true, true, 'moves'], |
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|
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// staves (staff) |
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['ffats', 5, true, true, 'staves'], |
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|
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// hooves (hoof), dwarves (dwarf), elves (elf), leaves (leaf) |
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['ff', 2, true, true, 'ffs'], |
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|
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// hooves (hoof), dwarves (dwarf), elves (elf), leaves (leaf) |
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['f', 1, true, true, ['fs', 'ves']], |
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|
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// arches (arch) |
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['hc', 2, true, true, 'ches'], |
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|
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// bushes (bush) |
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['hs', 2, true, true, 'shes'], |
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|
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// teeth (tooth) |
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['htoot', 5, true, true, 'teeth'], |
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|
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// bacteria (bacterium), criteria (criterion), phenomena (phenomenon) |
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['mu', 2, true, true, 'a'], |
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|
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// men (man), women (woman) |
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['nam', 3, true, true, 'men'], |
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|
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// people (person) |
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['nosrep', 6, true, true, ['persons', 'people']], |
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|
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// bacteria (bacterium), criteria (criterion), phenomena (phenomenon) |
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['noi', 3, true, true, 'ions'], |
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|
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// coupon (coupons) |
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['nop', 3, true, true, 'pons'], |
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|
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// seasons (season), treasons (treason), poisons (poison), lessons (lesson) |
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['nos', 3, true, true, 'sons'], |
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|
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// bacteria (bacterium), criteria (criterion), phenomena (phenomenon) |
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['no', 2, true, true, 'a'], |
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|
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// echoes (echo) |
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['ohce', 4, true, true, 'echoes'], |
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|
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// heroes (hero) |
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['oreh', 4, true, true, 'heroes'], |
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|
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// atlases (atlas) |
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['salta', 5, true, true, 'atlases'], |
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|
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// irises (iris) |
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['siri', 4, true, true, 'irises'], |
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|
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// analyses (analysis), ellipses (ellipsis), neuroses (neurosis) |
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// theses (thesis), emphases (emphasis), oases (oasis), |
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// crises (crisis) |
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['sis', 3, true, true, 'ses'], |
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|
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// accesses (access), addresses (address), kisses (kiss) |
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['ss', 2, true, false, 'sses'], |
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|
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// syllabi (syllabus) |
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['suballys', 8, true, true, 'syllabi'], |
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|
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// buses (bus) |
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['sub', 3, true, true, 'buses'], |
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|
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// circuses (circus) |
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['suc', 3, true, true, 'cuses'], |
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|
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// conspectuses (conspectus), prospectuses (prospectus) |
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['sutcep', 6, true, true, 'pectuses'], |
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|
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// fungi (fungus), alumni (alumnus), syllabi (syllabus), radii (radius) |
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['su', 2, true, true, 'i'], |
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|
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// news (news) |
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['swen', 4, true, true, 'news'], |
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|
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// feet (foot) |
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['toof', 4, true, true, 'feet'], |
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|
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// chateaux (chateau), bureaus (bureau) |
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['uae', 3, false, true, ['eaus', 'eaux']], |
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|
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// oxen (ox) |
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['xo', 2, false, false, 'oxen'], |
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|
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// hoaxes (hoax) |
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['xaoh', 4, true, false, 'hoaxes'], |
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|
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// indices (index) |
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['xedni', 5, false, true, ['indicies', 'indexes']], |
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|
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// boxes (box) |
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['xo', 2, false, true, 'oxes'], |
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|
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// indexes (index), matrixes (matrix) |
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['x', 1, true, false, ['cies', 'xes']], |
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|
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// appendices (appendix) |
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['xi', 2, false, true, 'ices'], |
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|
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// babies (baby) |
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['y', 1, false, true, 'ies'], |
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|
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// quizzes (quiz) |
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['ziuq', 4, true, false, 'quizzes'], |
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|
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// waltzes (waltz) |
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['z', 1, true, true, 'zes'], |
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]; |
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|
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/** |
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* A list of words which should not be inflected, reversed. |
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*/ |
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private const UNINFLECTED = [ |
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'', |
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|
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// data |
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'atad', |
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|
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// deer |
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'reed', |
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|
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// feedback |
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'kcabdeef', |
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|
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// fish |
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'hsif', |
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|
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// info |
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'ofni', |
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|
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// moose |
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'esoom', |
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|
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// series |
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'seires', |
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|
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// sheep |
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'peehs', |
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|
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// species |
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'seiceps', |
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]; |
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|
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/** |
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* {@inheritdoc} |
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*/ |
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public function singularize(string $plural): array |
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{ |
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$pluralRev = strrev($plural); |
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$lowerPluralRev = strtolower($pluralRev); |
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$pluralLength = \strlen($lowerPluralRev); |
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|
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// Check if the word is one which is not inflected, return early if so |
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if (\in_array($lowerPluralRev, self::UNINFLECTED, true)) { |
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return [$plural]; |
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} |
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|
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// The outer loop iterates over the entries of the plural table |
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// The inner loop $j iterates over the characters of the plural suffix |
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// in the plural table to compare them with the characters of the actual |
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// given plural suffix |
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foreach (self::PLURAL_MAP as $map) { |
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$suffix = $map[0]; |
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$suffixLength = $map[1]; |
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$j = 0; |
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|
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// Compare characters in the plural table and of the suffix of the |
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// given plural one by one |
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while ($suffix[$j] === $lowerPluralRev[$j]) { |
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// Let $j point to the next character |
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++$j; |
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|
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// Successfully compared the last character |
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// Add an entry with the singular suffix to the singular array |
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if ($j === $suffixLength) { |
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// Is there any character preceding the suffix in the plural string? |
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if ($j < $pluralLength) { |
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$nextIsVocal = false !== strpos('aeiou', $lowerPluralRev[$j]); |
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|
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if (!$map[2] && $nextIsVocal) { |
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// suffix may not succeed a vocal but next char is one |
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break; |
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} |
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|
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if (!$map[3] && !$nextIsVocal) { |
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// suffix may not succeed a consonant but next char is one |
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break; |
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} |
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} |
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|
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$newBase = substr($plural, 0, $pluralLength - $suffixLength); |
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$newSuffix = $map[4]; |
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|
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// Check whether the first character in the plural suffix |
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// is uppercased. If yes, uppercase the first character in |
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// the singular suffix too |
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$firstUpper = ctype_upper($pluralRev[$j - 1]); |
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|
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if (\is_array($newSuffix)) { |
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$singulars = []; |
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|
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foreach ($newSuffix as $newSuffixEntry) { |
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$singulars[] = $newBase.($firstUpper ? ucfirst($newSuffixEntry) : $newSuffixEntry); |
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} |
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|
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return $singulars; |
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} |
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|
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return [$newBase.($firstUpper ? ucfirst($newSuffix) : $newSuffix)]; |
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} |
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|
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// Suffix is longer than word |
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if ($j === $pluralLength) { |
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break; |
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} |
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} |
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} |
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|
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// Assume that plural and singular is identical |
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return [$plural]; |
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} |
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|
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/** |
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* {@inheritdoc} |
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*/ |
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public function pluralize(string $singular): array |
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{ |
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$singularRev = strrev($singular); |
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$lowerSingularRev = strtolower($singularRev); |
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$singularLength = \strlen($lowerSingularRev); |
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|
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// Check if the word is one which is not inflected, return early if so |
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if (\in_array($lowerSingularRev, self::UNINFLECTED, true)) { |
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return [$singular]; |
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} |
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|
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// The outer loop iterates over the entries of the singular table |
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// The inner loop $j iterates over the characters of the singular suffix |
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// in the singular table to compare them with the characters of the actual |
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// given singular suffix |
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foreach (self::SINGULAR_MAP as $map) { |
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$suffix = $map[0]; |
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$suffixLength = $map[1]; |
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$j = 0; |
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|
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// Compare characters in the singular table and of the suffix of the |
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// given plural one by one |
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|
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while ($suffix[$j] === $lowerSingularRev[$j]) { |
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// Let $j point to the next character |
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++$j; |
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|
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// Successfully compared the last character |
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// Add an entry with the plural suffix to the plural array |
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if ($j === $suffixLength) { |
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// Is there any character preceding the suffix in the plural string? |
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if ($j < $singularLength) { |
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$nextIsVocal = false !== strpos('aeiou', $lowerSingularRev[$j]); |
| 468 |
|
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if (!$map[2] && $nextIsVocal) { |
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// suffix may not succeed a vocal but next char is one |
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break; |
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} |
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|
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if (!$map[3] && !$nextIsVocal) { |
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// suffix may not succeed a consonant but next char is one |
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break; |
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} |
| 478 |
} |
| 479 |
|
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$newBase = substr($singular, 0, $singularLength - $suffixLength); |
| 481 |
$newSuffix = $map[4]; |
| 482 |
|
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// Check whether the first character in the singular suffix |
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// is uppercased. If yes, uppercase the first character in |
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// the singular suffix too |
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$firstUpper = ctype_upper($singularRev[$j - 1]); |
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|
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if (\is_array($newSuffix)) { |
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$plurals = []; |
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|
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foreach ($newSuffix as $newSuffixEntry) { |
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$plurals[] = $newBase.($firstUpper ? ucfirst($newSuffixEntry) : $newSuffixEntry); |
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} |
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|
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return $plurals; |
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} |
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|
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return [$newBase.($firstUpper ? ucfirst($newSuffix) : $newSuffix)]; |
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} |
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|
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// Suffix is longer than word |
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if ($j === $singularLength) { |
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break; |
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} |
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} |
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} |
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|
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// Assume that plural is singular with a trailing `s` |
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return [$singular.'s']; |
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} |
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} |
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|
