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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6 | class Task extends MY_Controller { |
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7 | |||
8 | /** |
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9 | * Constructor |
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10 | */ |
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11 | public function __construct() |
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19 | |||
20 | // -------------------------------------------------------------------------- |
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21 | |||
22 | /** |
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23 | * Redirect to task list |
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24 | */ |
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25 | public function index() |
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29 | |||
30 | // -------------------------------------------------------------------------- |
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31 | |||
32 | /** |
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33 | * List shared tasks |
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34 | */ |
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35 | View Code Duplication | public function shared() |
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46 | |||
47 | // -------------------------------------------------------------------------- |
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48 | |||
49 | /** |
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50 | * Get the main task view |
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51 | */ |
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52 | View Code Duplication | public function list_tasks() |
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63 | |||
64 | // -------------------------------------------------------------------------- |
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65 | |||
66 | /** |
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67 | * List archived tasks |
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68 | */ |
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69 | public function archive($page = 1) |
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98 | |||
99 | // -------------------------------------------------------------------------- |
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100 | |||
101 | /** |
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102 | * List overdue tasks |
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103 | */ |
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104 | View Code Duplication | public function overdue() |
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115 | |||
116 | // -------------------------------------------------------------------------- |
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117 | |||
118 | /** |
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119 | * Add a task |
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120 | */ |
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121 | public function add() |
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122 | { |
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123 | $data = array(); |
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124 | $data['err'] = ''; |
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125 | $data['cat_list'] = $this->todo->get_category_select(); |
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126 | $data['pri_list'] = $this->todo->get_priority_select(); |
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127 | $data['group_perms'] = ''; |
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128 | $data['groups'] = $this->todo->get_group_list($this->session->userdata('uid')); |
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129 | $data['task_title'] = ''; |
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130 | $data['description'] = ''; |
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131 | $data['due'] = mktime(12, 00, 00); |
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132 | $data['title'] = ''; |
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133 | $data['rem_hours'] = 0; |
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134 | $data['rem_minutes'] = 30; |
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135 | $data['reminder'] = FALSE; |
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136 | $data['friends'] = $this->todo->get_friend_list(); |
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137 | |||
138 | |||
139 | if ($this->input->post('add_sub') == 'Add Task') |
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140 | { |
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141 | $val = $this->task_model->validate_task(); |
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142 | |||
143 | if($val === TRUE) |
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144 | { |
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145 | $done = $this->task_model->add_task(); |
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146 | |||
147 | if ($done === TRUE) |
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148 | { |
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149 | //Redirect to task list |
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150 | $this->todo->redirect_303('task/list'); |
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151 | } |
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152 | else |
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153 | { |
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154 | $data['err'][] = "Database Error, Please try again later."; |
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155 | } |
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156 | } |
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157 | else |
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158 | { |
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159 | //Get form values |
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160 | $data = array_merge($data, $this->task_model->form_vals); |
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161 | $data['err'] = $val; |
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162 | |||
163 | } |
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164 | |||
165 | } |
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166 | |||
167 | $this->page->set_title("Add Task"); |
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168 | $this->page->build('task/add', $data); |
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169 | } |
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170 | |||
171 | // -------------------------------------------------------------------------- |
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172 | |||
173 | /** |
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174 | * Edit a task |
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175 | * |
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176 | * @param int $task_id |
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177 | */ |
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178 | public function edit(int $task_id) |
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217 | |||
218 | // -------------------------------------------------------------------------- |
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219 | |||
220 | /** |
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221 | * View an individual task |
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222 | * |
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223 | * @param int $task_id |
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224 | */ |
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225 | public function view(int $task_id = NULL) |
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246 | |||
247 | // -------------------------------------------------------------------------- |
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248 | |||
249 | /** |
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250 | * Delete a task |
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251 | */ |
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252 | public function delete(int $task_id) |
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256 | |||
257 | // -------------------------------------------------------------------------- |
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258 | |||
259 | /** |
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260 | * Add a task comment |
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261 | */ |
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262 | public function add_task_comment() |
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267 | |||
268 | // -------------------------------------------------------------------------- |
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269 | |||
270 | /** |
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271 | * Get a list of comments for the task |
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272 | */ |
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273 | public function get_task_comments() |
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281 | |||
282 | // -------------------------------------------------------------------------- |
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283 | |||
284 | /** |
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285 | * Delete a task comment |
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286 | */ |
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287 | public function del_task_comment() |
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292 | |||
293 | // -------------------------------------------------------------------------- |
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294 | |||
295 | /** |
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296 | * Update the status of a task |
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297 | */ |
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298 | public function update_status() |
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303 | |||
304 | // -------------------------------------------------------------------------- |
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305 | |||
306 | /** |
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307 | * Update the category that the task belongs to. |
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308 | */ |
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309 | public function update_category() |
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314 | |||
315 | // -------------------------------------------------------------------------- |
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316 | |||
317 | /** |
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318 | * Add a checklist item to the task |
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319 | */ |
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320 | public function add_checklist_item() |
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337 | |||
338 | // -------------------------------------------------------------------------- |
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339 | |||
340 | /** |
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341 | * Update a task checklist item |
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342 | */ |
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343 | public function update_checklist_item() |
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350 | } |
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351 | // End of controllers/task.php |
This check marks access to variables or properties that have not been declared yet. While PHP has no explicit notion of declaring a variable, accessing it before a value is assigned to it is most likely a bug.