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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7 | class NotInRule extends NotRule |
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8 | { |
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9 | /** @var string operator */ |
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10 | const operator = '!in'; |
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11 | |||
12 | /** |
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13 | * @param string $field The field to apply the rule on. |
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14 | * @param array $value The value the field can equal to. |
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15 | */ |
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16 | 26 | public function __construct( $field, $possibilities ) |
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20 | |||
21 | /** |
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22 | */ |
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23 | 14 | public function isNormalizationAllowed(array $contextual_options=[]) |
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32 | |||
33 | /** |
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34 | */ |
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35 | 25 | public function getField() |
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36 | { |
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37 | 25 | if (! $this->getOperandAt(0)) { |
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38 | // TODO a NotRule with no operand should be simplified as |
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39 | // a TrueRule |
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40 | 1 | throw new \LogicException( |
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41 | "Trying to get the field of an InRule negation missing its operand" |
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42 | 1 | ); |
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43 | } |
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44 | |||
45 | 24 | return $this->getOperandAt(0)->getField(); |
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46 | } |
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47 | |||
48 | /** |
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49 | */ |
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50 | 2 | public function setField($field) |
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51 | { |
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52 | 2 | if (! $this->getOperandAt(0)) { |
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53 | // TODO a NotRule with no operand should be simplified as |
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54 | // a TrueRule |
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55 | 1 | throw new \LogicException( |
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56 | "Trying to set the field of an InRule negation missing its operand" |
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57 | 1 | ); |
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58 | } |
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59 | |||
60 | 1 | return $this->getOperandAt(0)->setField($field); |
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61 | } |
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62 | |||
63 | /** |
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64 | * @return array |
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65 | */ |
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66 | 23 | public function getPossibilities() |
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75 | |||
76 | /** |
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77 | * @return $this |
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78 | */ |
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79 | 6 | public function setPossibilities($possibilities) |
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105 | |||
106 | /** |
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107 | */ |
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108 | 3 | public function getValues() |
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112 | |||
113 | /** |
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114 | */ |
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115 | 5 | public function hasSolution(array $contextual_options=[]) |
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119 | |||
120 | /** |
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121 | * @param array $options + show_instance=false Display the operator of the rule or its instance id |
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122 | * |
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123 | * @return array |
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124 | */ |
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125 | 23 | public function toArray(array $options=[]) |
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147 | |||
148 | /** |
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149 | * @todo cache support |
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150 | */ |
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151 | 1 | View Code Duplication | public function toString(array $options=[]) |
166 | |||
167 | /**/ |
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168 | } |
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169 |
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.