Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
| 1 | <?php | ||
| 18 | class Gallery | ||
| 19 | { | ||
| 20 | /** @var integer materialFieldId Table materialField identifier */ | ||
| 21 | protected $materialFieldId = null; | ||
| 22 | |||
| 23 | /** @var QueryInterface Database query interface */ | ||
| 24 | protected $query; | ||
| 25 | |||
| 26 | /** | ||
| 27 | * Constructor Gallery. | ||
| 28 | * This constructor finds identifier additional field gallery from | ||
| 29 | * database record its material and field identifiers. | ||
| 30 | * | ||
| 31 | * @param QueryInterface $query Database query interface | ||
| 32 | * @param integer $materialId material identifier | ||
| 33 | * @param integer $fieldId field identifier | ||
| 34 | */ | ||
| 35 | 3 | public function __construct(QueryInterface $query, $materialId, $fieldId) | |
| 56 | |||
| 57 | /** | ||
| 58 | * Getting quantity images in additional field gallery | ||
| 59 | * | ||
| 60 | * @return integer $count | ||
| 61 | */ | ||
| 62 | 1 | public function getCount() | |
| 78 | |||
| 79 | /** | ||
| 80 | * Check on empty gallery. If materialFieldId = null and quantity images not more 1 then material not has images. | ||
| 81 | * | ||
| 82 | * @return boolean | ||
| 83 | **/ | ||
| 84 | 3 | public function hasImages() | |
| 102 | |||
| 103 | /** | ||
| 104 | * Get collection of images for material by gallery additional field selector. If none is passed | ||
| 105 | * all images from gallery table would be returned empty array. | ||
| 106 | * | ||
| 107 | * @param integer $currentPage current page with images. Min value = 1 | ||
| 108 | * @param integer $countView quantity view by page | ||
| 109 | * | ||
| 110 | *@return array | ||
| 111 | * @deprecated Use find() | ||
| 112 | */ | ||
| 113 | 2 | public function getImages($currentPage = null, $countView = 20) | |
| 117 | |||
| 118 | /** | ||
| 119 | * Perform SamsonCMS query and get entity gallery images. | ||
| 120 | * | ||
| 121 | * @param int $page Page number | ||
| 122 | * @param int $size Page size | ||
| 123 | * | ||
| 124 | * @return GalleryField[] Collection of entity gallery images | ||
| 125 | */ | ||
| 126 | 2 | public function find($page = null, $size = null) | |
| 153 | } | ||
| 154 | 
This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently.
Both the
$myVarassignment in line 1 and the$higherassignment in line 2 are dead. The first because$myVaris never used and the second because$higheris always overwritten for every possible time line.