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 |
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| 22 | class PHPCompatibility_Sniffs_PHP_NewClassesSniff extends PHPCompatibility_Sniff |
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| 23 | { |
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| 24 | |||
| 25 | /** |
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| 26 | * A list of new classes, not present in older versions. |
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| 27 | * |
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| 28 | * The array lists : version number with false (not present) or true (present). |
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| 29 | * If's sufficient to list the first version where the class appears. |
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| 30 | * |
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| 31 | * @var array(string => array(string => int|string|null)) |
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| 32 | */ |
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| 33 | protected $newClasses = array( |
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| 34 | 'DateTime' => array( |
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| 35 | '5.1' => false, |
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| 36 | '5.2' => true |
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| 37 | ), |
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| 38 | 'DateTimeZone' => array( |
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| 39 | '5.1' => false, |
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| 40 | '5.2' => true |
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| 41 | ), |
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| 42 | 'RegexIterator' => array( |
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| 43 | '5.1' => false, |
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| 44 | '5.2' => true |
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| 45 | ), |
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| 46 | 'RecursiveRegexIterator' => array( |
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| 47 | '5.1' => false, |
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| 48 | '5.2' => true |
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| 49 | ), |
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| 50 | |||
| 51 | 'DateInterval' => array( |
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| 52 | '5.2' => false, |
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| 53 | '5.3' => true |
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| 54 | ), |
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| 55 | 'DatePeriod' => array( |
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| 56 | '5.2' => false, |
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| 57 | '5.3' => true |
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| 58 | ), |
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| 59 | 'Phar' => array( |
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| 60 | '5.2' => false, |
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| 61 | '5.3' => true |
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| 62 | ), |
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| 63 | 'PharData' => array( |
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| 64 | '5.2' => false, |
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| 65 | '5.3' => true |
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| 66 | ), |
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| 67 | 'PharException' => array( |
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| 68 | '5.2' => false, |
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| 69 | '5.3' => true |
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| 70 | ), |
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| 71 | 'PharFileInfo' => array( |
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| 72 | '5.2' => false, |
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| 73 | '5.3' => true |
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| 74 | ), |
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| 75 | 'FilesystemIterator' => array( |
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| 76 | '5.2' => false, |
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| 77 | '5.3' => true |
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| 78 | ), |
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| 79 | 'GlobIterator' => array( |
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| 80 | '5.2' => false, |
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| 81 | '5.3' => true |
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| 82 | ), |
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| 83 | 'MultipleIterator' => array( |
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| 84 | '5.2' => false, |
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| 85 | '5.3' => true |
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| 86 | ), |
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| 87 | 'RecursiveTreeIterator' => array( |
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| 88 | '5.2' => false, |
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| 89 | '5.3' => true |
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| 90 | ), |
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| 91 | 'SplDoublyLinkedList' => array( |
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| 92 | '5.2' => false, |
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| 93 | '5.3' => true |
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| 94 | ), |
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| 95 | 'SplFixedArray' => array( |
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| 96 | '5.2' => false, |
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| 97 | '5.3' => true |
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| 98 | ), |
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| 99 | 'SplHeap' => array( |
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| 100 | '5.2' => false, |
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| 101 | '5.3' => true |
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| 102 | ), |
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| 103 | 'SplMaxHeap' => array( |
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| 104 | '5.2' => false, |
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| 105 | '5.3' => true |
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| 106 | ), |
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| 107 | 'SplMinHeap' => array( |
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| 108 | '5.2' => false, |
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| 109 | '5.3' => true |
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| 110 | ), |
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| 111 | 'SplPriorityQueue' => array( |
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| 112 | '5.2' => false, |
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| 113 | '5.3' => true |
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| 114 | ), |
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| 115 | 'SplQueue' => array( |
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| 116 | '5.2' => false, |
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| 117 | '5.3' => true |
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| 118 | ), |
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| 119 | 'SplStack' => array( |
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| 120 | '5.2' => false, |
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| 121 | '5.3' => true |
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| 122 | ), |
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| 123 | |||
| 124 | 'CallbackFilterIterator' => array( |
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| 125 | '5.3' => false, |
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| 126 | '5.4' => true |
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| 127 | ), |
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| 128 | 'RecursiveCallbackFilterIterator' => array( |
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| 129 | '5.3' => false, |
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| 130 | '5.4' => true |
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| 131 | ), |
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| 132 | 'ReflectionZendExtension' => array( |
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| 133 | '5.3' => false, |
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| 134 | '5.4' => true |
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| 135 | ), |
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| 136 | 'JsonSerializable' => array( |
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| 137 | '5.3' => false, |
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| 138 | '5.4' => true |
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| 139 | ), |
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| 140 | 'SessionHandler' => array( |
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| 141 | '5.3' => false, |
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| 142 | '5.4' => true |
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| 143 | ), |
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| 144 | 'SNMP' => array( |
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| 145 | '5.3' => false, |
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| 146 | '5.4' => true |
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| 147 | ), |
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| 148 | 'Transliterator' => array( |
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| 149 | '5.3' => false, |
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| 150 | '5.4' => true |
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| 151 | ), |
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| 152 | 'Spoofchecker' => array( |
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| 153 | '5.3' => false, |
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| 154 | '5.4' => true |
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| 155 | ), |
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| 156 | |||
| 157 | 'CURLFile' => array( |
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| 158 | '5.4' => false, |
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| 159 | '5.5' => true |
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| 160 | ), |
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| 161 | 'DateTimeImmutable' => array( |
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| 162 | '5.4' => false, |
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| 163 | '5.5' => true |
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| 164 | ), |
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| 165 | 'IntlCalendar' => array( |
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| 166 | '5.4' => false, |
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| 167 | '5.5' => true |
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| 168 | ), |
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| 169 | 'IntlGregorianCalendar' => array( |
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| 170 | '5.4' => false, |
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| 171 | '5.5' => true |
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| 172 | ), |
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| 173 | 'IntlTimeZone' => array( |
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| 174 | '5.4' => false, |
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| 175 | '5.5' => true |
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| 176 | ), |
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| 177 | 'IntlBreakIterator' => array( |
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| 178 | '5.4' => false, |
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| 179 | '5.5' => true |
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| 180 | ), |
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| 181 | 'IntlRuleBasedBreakIterator' => array( |
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| 182 | '5.4' => false, |
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| 183 | '5.5' => true |
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| 184 | ), |
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| 185 | 'IntlCodePointBreakIterator' => array( |
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| 186 | '5.4' => false, |
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| 187 | '5.5' => true |
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| 188 | ), |
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| 189 | |||
| 190 | ); |
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| 191 | |||
| 192 | |||
| 193 | /** |
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| 194 | * If true, an error will be thrown; otherwise a warning. |
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| 195 | * |
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| 196 | * @var bool |
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| 197 | */ |
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| 198 | protected $error = false; |
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| 199 | |||
| 200 | |||
| 201 | /** |
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| 202 | * Returns an array of tokens this test wants to listen for. |
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| 203 | * |
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| 204 | * @return array |
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| 205 | */ |
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| 206 | public function register() |
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| 211 | |||
| 212 | |||
| 213 | /** |
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| 214 | * Processes this test, when one of its tokens is encountered. |
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| 215 | * |
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| 216 | * @param PHP_CodeSniffer_File $phpcsFile The file being scanned. |
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| 217 | * @param int $stackPtr The position of the current token in |
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| 218 | * the stack passed in $tokens. |
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| 219 | * |
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| 220 | * @return void |
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| 221 | */ |
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| 222 | public function process(PHP_CodeSniffer_File $phpcsFile, $stackPtr) |
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| 250 | |||
| 251 | |||
| 252 | /** |
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| 253 | * Generates the error or wanrning for this sniff. |
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| 254 | * |
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| 255 | * @param PHP_CodeSniffer_File $phpcsFile The file being scanned. |
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| 256 | * @param int $stackPtr The position of the function |
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| 257 | * in the token array. |
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| 258 | * @param string $function The name of the function. |
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| 259 | * @param string $pattern The pattern used for the match. |
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| 260 | * |
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| 261 | * @return void |
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| 262 | */ |
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| 263 | View Code Duplication | protected function addError($phpcsFile, $stackPtr, $className, $pattern=null) |
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| 291 | |||
| 292 | }//end class |
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| 293 |
This check looks for PHPDoc comments describing methods or function parameters that do not exist on the corresponding method or function.
Consider the following example. The parameter
$italyis not defined by the methodfinale(...).The most likely cause is that the parameter was removed, but the annotation was not.