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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11 | class ShowOneService |
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12 | { |
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13 | /** |
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14 | * @var array $commentitem, the chosen comment. |
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15 | */ |
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16 | protected $comment; |
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17 | protected $comments; |
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18 | protected $sess; |
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19 | |||
20 | |||
21 | /** |
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22 | * Constructor injects with DI container and the id to update. |
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23 | * |
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24 | * @param Anax\DI\DIInterface $di a service container |
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25 | * @param integer $id to show |
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26 | */ |
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27 | 1 | public function __construct(DIInterface $di, $id) |
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28 | { |
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29 | 1 | $this->di = $di; |
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30 | 1 | $this->comment = $this->getItemDetails($id); |
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31 | |||
32 | 1 | $where = "parentid = ?"; |
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33 | 1 | $params = [$id]; |
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34 | 1 | $this->comments = $this->getParentDetails($where, $params); |
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35 | |||
36 | 1 | $session = $this->di->get("session"); |
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37 | 1 | $this->sess = $session->get("user"); |
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38 | 1 | } |
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39 | |||
40 | |||
41 | /** |
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42 | * Get details on item to load form with. |
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43 | * |
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44 | * @param integer $id get details on item with id. |
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45 | * |
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46 | * @return Comm |
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47 | */ |
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48 | 1 | View Code Duplication | public function getItemDetails($id) |
49 | { |
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50 | 1 | $comm = new Comm(); |
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51 | 1 | $comm->setDb($this->di->get("db")); |
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52 | 1 | $comm->find("id", $id); |
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53 | 1 | return $comm; |
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54 | } |
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55 | |||
56 | |||
57 | /** |
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58 | * Get details on item to load form with. |
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59 | * |
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60 | * @param string $where |
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61 | * @param array $params get details on item with id parentid. |
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62 | * |
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63 | * @return Comm |
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64 | */ |
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65 | 1 | public function getParentDetails($where, $params) |
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66 | { |
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67 | 1 | $comm = new Comm(); |
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68 | 1 | $comm->setDb($this->di->get("db")); |
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69 | 1 | return $comm->findAllWhere($where, $params); |
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70 | } |
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71 | |||
72 | |||
73 | /** |
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74 | * Sets the callable to use for creating routes. |
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75 | * |
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76 | * @param callable $urlCreate to create framework urls. |
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77 | * |
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78 | * @return void |
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79 | */ |
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80 | public function setUrlCreator($route) |
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85 | |||
86 | |||
87 | /** |
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88 | * Returns link for gravatar img |
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89 | * |
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90 | * @param object $item |
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91 | * @return string htmlcode |
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92 | */ |
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93 | 1 | public function getGravatar($item) |
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94 | { |
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95 | 1 | $comm = new Comm(); |
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96 | 1 | $gravatar = $comm->getGravatar($item); |
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97 | 1 | return '<img src="' . $gravatar . '" alt=""/>'; |
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98 | } |
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99 | |||
100 | |||
101 | /** |
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102 | * Returns json_decoded title and text |
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103 | * If lead text, headline is larger font |
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104 | * @param object $item |
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105 | * @return string htmlcode |
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106 | */ |
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107 | 1 | public function getDecode(Comm $item, $lead = null) |
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108 | { |
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109 | 1 | $comt = json_decode($item->comment); |
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110 | 1 | if ($comt->frontmatter->title) { |
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111 | 1 | $til = $comt->frontmatter->title; |
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112 | 1 | } else { |
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113 | $til = $item->title; |
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114 | } |
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115 | 1 | $comt = $comt->text; |
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116 | 1 | if ($lead) { |
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117 | return '<h3>' . $til . '</h3><p>' . $comt . '</p>'; |
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118 | } |
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119 | 1 | return '<h4>' . $til . '</h4><p>' . $comt . '</p>'; |
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120 | } |
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121 | |||
122 | |||
123 | /** |
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124 | * If param met, returns string with edit-links |
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125 | * @param boolean $isadmin |
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126 | * @param object $item |
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127 | * @param string $del |
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128 | * @return string htmlcode |
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129 | */ |
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130 | public function getCanEdit(Comm $item, $isadmin, $del) |
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131 | { |
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132 | $canedit = ""; |
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133 | $update = $this->setUrlCreator("comm/update"); |
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134 | if ($item->userid == $this->sess['id'] || $isadmin) { |
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135 | $canedit = '<br /><a href="' . $update . '/' . $item->id . '">Redigera</a>'; |
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136 | $canedit .= ' | <a href="' . $del . '/' . $item->id . '">Ta bort inlägget</a></p>'; |
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137 | } else { |
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138 | $canedit .= '</p>'; |
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139 | } |
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140 | return $canedit; |
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141 | } |
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142 | |||
143 | |||
144 | /** |
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145 | * If session contains correct id, returns string with edit-links |
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146 | * |
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147 | * @return string htmlcode |
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148 | */ |
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149 | public function getLoginurl() |
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161 | |||
162 | |||
163 | /** |
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164 | * If loggedin allowed to edit |
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165 | * |
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166 | * @param boolean $isadmin |
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167 | * @param string $userid |
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168 | * @param string $commid |
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169 | * @param string $htmlcomment, link |
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170 | * |
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171 | * @return string htmlcode |
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172 | */ |
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173 | public function getEdit($isadmin, $userid, $commid, $htmlcomment) |
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184 | |||
185 | |||
186 | /** |
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187 | * If session contains correct id, returns string with edit-links |
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188 | * |
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189 | * @return string htmlcode |
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190 | */ |
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191 | public function getDelete($isadmin, $userid, $del, $commid) |
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198 | |||
199 | |||
200 | /** |
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201 | * Returns html for each item |
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202 | * |
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203 | * @param object $item |
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204 | * @param string $can |
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205 | * |
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206 | * @return string htmlcod |
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207 | */ |
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208 | public function getValHtml(Comm $item, $can) |
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220 | |||
221 | |||
222 | /** |
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223 | * Returns all text for the view |
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224 | * |
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225 | * @return string htmlcode |
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226 | */ |
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227 | public function getHTML() |
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257 | } |
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258 |
In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code:
Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: