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 | ||
| 38 | class TableRow extends AbstractElement | ||
| 39 | { | ||
| 40 | /** | ||
| 41 | * | ||
| 42 | * @var TableCell[] | ||
| 43 | */ | ||
| 44 | private $cells; | ||
| 45 | |||
| 46 | /** | ||
| 47 | * a reference to the section this row is attached to | ||
| 48 | * | ||
| 49 | * @var AbstractTableSection | ||
| 50 | */ | ||
| 51 | private $section; | ||
| 52 | |||
| 53 | /** | ||
| 54 | * | ||
| 55 | * @var Reference | ||
| 56 | */ | ||
| 57 | private $reference; | ||
| 58 | |||
| 59 | function __construct(AbstractTableSection $section = null) | ||
| 63 | |||
| 64 | /** | ||
| 65 | * | ||
| 66 | * @param string $content | ||
| 67 | * @return TableCell | ||
| 68 | */ | ||
| 69 | function createCell($content) | ||
| 80 | |||
| 81 | /** | ||
| 82 | * | ||
| 83 | * @param TableCell $cell | ||
| 84 | * @return $this | ||
| 85 | */ | ||
| 86 | public function addCell(TableCell $cell) | ||
| 94 | |||
| 95 | /** | ||
| 96 | * | ||
| 97 | * @return TableCell[] | ||
| 98 | */ | ||
| 99 | function getCells(): array | ||
| 103 | |||
| 104 | function getSection(): AbstractTableSection | ||
| 108 | |||
| 109 | function setCells(array $cells) | ||
| 114 | |||
| 115 | function setSection(AbstractTableSection $section) | ||
| 120 | |||
| 121 | /** | ||
| 122 | * | ||
| 123 | * @return Reference | ||
| 124 | */ | ||
| 125 | function getReference() | ||
| 129 | |||
| 130 | /** | ||
| 131 | * | ||
| 132 | * @param ReferenceType $reference | ||
| 133 | * @return $this | ||
| 134 | */ | ||
| 135 | function setReference(ReferenceType $reference) | ||
| 141 | |||
| 142 | |||
| 143 | /** | ||
| 144 | * | ||
| 145 | * @return boolean | ||
| 146 | */ | ||
| 147 | public function isEmpty() | ||
| 151 | |||
| 152 | |||
| 153 | protected function getElementTag(): string | ||
| 157 | |||
| 158 | View Code Duplication | public function toDOMElement(\DOMDocument $doc): \DOMElement | |
| 172 | } | ||
| 173 | 
Adding explicit visibility (
private,protected, orpublic) is generally recommend to communicate to other developers how, and from where this method is intended to be used.