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
$italy
is not defined by the methodfinale(...)
.The most likely cause is that the parameter was removed, but the annotation was not.