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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16 | class FlexiBeeRW extends FlexiBeeRO |
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17 | { |
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18 | /** |
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19 | * Sloupeček obsahující datum vložení záznamu do shopu. |
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20 | * |
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21 | * @var string |
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22 | */ |
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23 | public $myCreateColumn = 'false'; |
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24 | |||
25 | /** |
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26 | * Slopecek obsahujici datum poslení modifikace záznamu do shopu. |
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27 | * |
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28 | * @var string |
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29 | */ |
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30 | public $myLastModifiedColumn = 'lastUpdate'; |
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31 | |||
32 | /** |
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33 | * Last Inserted ID. |
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34 | * |
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35 | * @var int |
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36 | */ |
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37 | public $lastInsertedID = null; |
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38 | |||
39 | /** |
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40 | * Array of fields for next curl POST operation |
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41 | * |
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42 | * @var string |
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43 | */ |
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44 | public $postFields = null; |
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45 | |||
46 | /** |
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47 | * Save record (if evidence allow to). |
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48 | * Uloží záznam (pokud to evidence dovoluje) |
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49 | * |
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50 | * @param array $data Data to save |
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51 | * @throws Exception Evidence does not support Import |
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52 | * |
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53 | * @return array odpověď |
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54 | */ |
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55 | public function insertToFlexiBee($data = null) |
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91 | |||
92 | /** |
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93 | * Give you last inserted record ID. |
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94 | * |
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95 | * @return int |
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96 | */ |
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97 | public function getLastInsertedId() |
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101 | |||
102 | /** |
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103 | * Smaže záznam |
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104 | * Delete record in FlexiBee |
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105 | * |
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106 | * @param int|string $id identifikátor záznamu |
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107 | * @return boolean Response code is 200 ? |
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108 | */ |
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109 | public function deleteFromFlexiBee($id = null) |
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118 | |||
119 | /** |
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120 | * Control for existing column names in evidence and take data |
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121 | * |
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122 | * @param array $data Data to keep |
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123 | * @return int number of records taken |
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124 | */ |
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125 | public function takeData($data) |
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154 | |||
155 | /** |
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156 | * Control data for mandatory columns presence. |
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157 | * |
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158 | * @param array $data |
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159 | * @return array List of missing columns. Empty if all is ok |
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160 | */ |
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161 | View Code Duplication | public function controlMandatoryColumns($data = null) |
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179 | |||
180 | /** |
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181 | * Control data for readonly columns presence. |
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182 | * |
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183 | * @param array $data |
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184 | * @return array List of ReadOnly columns. Empty if all is ok |
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185 | */ |
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186 | View Code Duplication | public function controlReadOnlyColumns($data = null) |
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204 | |||
205 | /** |
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206 | * Convert Timestamp to FlexiBee Date format. |
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207 | * |
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208 | * @param int $timpestamp |
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209 | * |
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210 | * @return string FlexiBee Date or NULL |
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211 | */ |
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212 | View Code Duplication | public static function timestampToFlexiDate($timpestamp = null) |
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222 | |||
223 | /** |
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224 | * Convert Timestamp to Flexi DateTime format. |
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225 | * |
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226 | * @param int $timpestamp |
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227 | * |
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228 | * @return string FlexiBee DateTime or NULL |
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229 | */ |
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230 | View Code Duplication | public static function timestampToFlexiDateTime($timpestamp = null) |
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240 | |||
241 | } |
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242 |
Adding an explicit array definition is generally preferable to implicit array definition as it guarantees a stable state of the code.
Let’s take a look at an example:
As you can see in this example, the array
$myArray
is initialized the first time when the foreach loop is entered. You can also see that the value of thebar
key is only written conditionally; thus, its value might result from a previous iteration.This might or might not be intended. To make your intention clear, your code more readible and to avoid accidental bugs, we recommend to add an explicit initialization $myArray = array() either outside or inside the foreach loop.