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:
Complex classes like LegacyLogger often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use LegacyLogger, and based on these observations, apply Extract Interface, too.
1 | <?php |
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31 | class LegacyLogger implements LoggerInterface |
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32 | { |
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33 | /** |
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34 | * @var $queries array of query log lines |
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35 | */ |
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36 | protected $queries = array(); |
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37 | |||
38 | /** |
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39 | * @var $blocks array of block log lines |
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40 | */ |
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41 | protected $blocks = array(); |
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42 | |||
43 | /** |
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44 | * @var $extra array of extra log lines |
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45 | */ |
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46 | protected $extra = array(); |
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47 | |||
48 | /** |
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49 | * @var start time information by name |
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50 | */ |
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51 | protected $logstart = array(); |
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52 | |||
53 | /** |
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54 | * @var end time information by name |
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55 | */ |
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56 | protected $logend = array(); |
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57 | |||
58 | /** |
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59 | * @var $errors array of error log lines |
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60 | */ |
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61 | protected $errors = array(); |
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62 | |||
63 | /** |
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64 | * @var $deprecated array of deprecated log lines |
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65 | */ |
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66 | protected $deprecated = array(); |
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67 | |||
68 | /** |
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69 | * @var true if rendering enables |
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70 | */ |
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71 | protected $renderingEnabled = false; |
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72 | |||
73 | /** |
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74 | * @var true is logging is activated |
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75 | */ |
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76 | protected $activated = false; |
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77 | |||
78 | /** |
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79 | * @var mixed boolean false if configs no set or read, array of module/user configs |
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80 | */ |
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81 | protected $configs = false; |
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82 | |||
83 | /** |
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84 | * constructor |
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85 | */ |
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86 | public function __construct() |
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90 | |||
91 | /** |
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92 | * @var true if rendering enables |
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93 | */ |
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94 | protected $usePopup = false; |
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95 | |||
96 | |||
97 | /** |
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98 | * Get a reference to the only instance of this class |
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99 | * |
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100 | * @return object LoggerAbstract reference to the only instance |
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101 | */ |
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102 | public static function getInstance() |
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103 | { |
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104 | static $instance; |
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105 | if (!isset($instance)) { |
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106 | $class = __CLASS__; |
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107 | $instance = new $class(); |
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108 | } |
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109 | |||
110 | return $instance; |
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111 | } |
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112 | |||
113 | /** |
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114 | * Save a copy of our config array |
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115 | * |
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116 | * @param array $configs array of module/user config options |
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117 | * |
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118 | * @return void |
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119 | */ |
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120 | public function setConfigs($configs) |
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124 | |||
125 | /** |
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126 | * disable logging |
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127 | * |
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128 | * @return void |
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129 | */ |
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130 | public function disable() |
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131 | { |
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132 | //error_reporting(0); |
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133 | $this->activated = false; |
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134 | } |
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135 | |||
136 | /** |
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137 | * Enable logger output rendering |
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138 | * When output rendering is enabled, the logger will insert its output within the page content. |
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139 | * If the string <!--{xo-logger-output}--> is found in the page content, the logger output will |
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140 | * replace it, otherwise it will be inserted after all the page output. |
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141 | * |
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142 | * @return void |
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143 | */ |
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144 | public function enable() |
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156 | |||
157 | /** |
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158 | * report enabled status |
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159 | * |
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160 | * @return bool |
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161 | */ |
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162 | public function isEnable() |
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166 | |||
167 | /** |
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168 | * disable output for the benefit of ajax scripts |
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169 | * |
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170 | * @return void |
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171 | */ |
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172 | public function quiet() |
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176 | |||
177 | /** |
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178 | * Add our resources to the theme as soon as it is available, otherwise return |
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179 | * |
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180 | * @return void |
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181 | */ |
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182 | private function addToTheme() |
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198 | |||
199 | /** |
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200 | * Start a timer |
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201 | * |
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202 | * @param string $name name of the timer |
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203 | * |
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204 | * @return void |
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205 | */ |
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206 | public function startTime($name = 'XOOPS') |
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207 | { |
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208 | if ($this->activated) { |
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209 | $this->logstart[$name] = microtime(true); |
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210 | } |
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211 | } |
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212 | |||
213 | /** |
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214 | * Stop a timer |
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215 | * |
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216 | * @param string $name name of the timer |
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217 | * |
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218 | * @return void |
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219 | */ |
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220 | public function stopTime($name = 'XOOPS') |
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221 | { |
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222 | if ($this->activated) { |
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223 | $this->logend[$name] = microtime(true); |
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224 | } |
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225 | } |
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226 | |||
227 | /** |
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228 | * Log a database query |
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229 | * |
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230 | * @param string $sql sql that was processed |
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231 | * @param string $error error message |
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232 | * @param int $errno error number |
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233 | * @param float $query_time execution time |
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234 | * |
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235 | * @return void |
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236 | */ |
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237 | public function addQuery($sql, $error = null, $errno = null, $query_time = null) |
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238 | { |
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239 | if ($this->activated) { |
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240 | $this->queries[] = array( |
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241 | 'sql' => $sql, 'error' => $error, 'errno' => $errno, 'query_time' => $query_time |
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242 | ); |
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243 | } |
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244 | } |
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245 | |||
246 | /** |
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247 | * Log display of a block |
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248 | * |
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249 | * @param string $name name of the block |
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250 | * @param bool $cached was the block cached? |
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251 | * @param int $cachetime cachetime of the block |
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252 | * |
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253 | * @return void |
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254 | */ |
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255 | public function addBlock($name, $cached = false, $cachetime = 0) |
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256 | { |
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257 | if ($this->activated) { |
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258 | $this->blocks[] = array('name' => $name, 'cached' => $cached, 'cachetime' => $cachetime); |
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259 | } |
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260 | } |
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261 | |||
262 | /** |
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263 | * Log extra information |
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264 | * |
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265 | * @param string $name name for the entry |
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266 | * @param string $msg text message for the entry |
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267 | * |
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268 | * @return void |
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269 | */ |
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270 | public function addExtra($name, $msg) |
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271 | { |
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272 | if ($this->activated) { |
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273 | $this->extra[] = array('name' => $name, 'msg' => $msg); |
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274 | } |
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275 | } |
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276 | |||
277 | /** |
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278 | * Log messages for deprecated functions |
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279 | * |
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280 | * @param string $msg name for the entry |
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281 | * |
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282 | * @return void |
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283 | */ |
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284 | public function addDeprecated($msg) |
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285 | { |
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286 | if ($this->activated) { |
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287 | $this->deprecated[] = $msg; |
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288 | } |
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289 | } |
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290 | |||
291 | /** |
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292 | * Log exceptions |
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293 | * |
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294 | * @param Exception $e name for the entry |
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295 | * |
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296 | * @return void |
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297 | */ |
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298 | public function addException($e) |
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299 | { |
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300 | if ($this->activated) { |
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301 | $this->log( |
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302 | LogLevel::ERROR, |
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303 | 'Exception: ' . $e->getMessage() . ' - ' . |
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304 | $this->sanitizePath($e->getFile()) . ' ' . $e->getLine() |
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305 | ); |
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306 | } |
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307 | } |
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308 | |||
309 | /** |
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310 | * sanitizePath |
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311 | * |
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312 | * @param string $path path name to sanitize |
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313 | * |
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314 | * @return string path with top levels removed |
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315 | */ |
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316 | View Code Duplication | public function sanitizePath($path) |
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317 | { |
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318 | $path = str_replace( |
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319 | array( |
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320 | '\\', |
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321 | \XoopsBaseConfig::get('root-path'), |
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322 | str_replace('\\', '/', realpath(\XoopsBaseConfig::get('root-path'))) |
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323 | ), |
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324 | array('/', '', ''), |
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325 | $path |
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326 | ); |
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327 | return $path; |
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328 | } |
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329 | |||
330 | /** |
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331 | * Enable logger output rendering |
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332 | * When output rendering is enabled, the logger will insert its output within the page content. |
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333 | * If the string <!--{xo-logger-output}--> is found in the page content, the logger output will |
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334 | * replace it, otherwise it will be inserted after all the page output. |
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335 | * |
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336 | * @return void |
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337 | */ |
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338 | public function enableRendering() |
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339 | { |
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340 | if (!$this->renderingEnabled) { |
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341 | ob_start(array(&$this, 'render')); |
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342 | $this->renderingEnabled = true; |
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343 | } |
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344 | } |
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345 | |||
346 | /** |
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347 | * Output buffering callback inserting logger dump in page output |
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348 | * |
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349 | * @param string $output output buffer to add logger rendering to |
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350 | * |
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351 | * @return string output |
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352 | */ |
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353 | public function render($output) |
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370 | |||
371 | /** |
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372 | * Dump output |
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373 | * |
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374 | * @param string $mode unused |
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375 | * |
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376 | * @return string output |
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377 | */ |
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378 | public function dump($mode = '') |
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590 | |||
591 | /** |
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592 | * get the current execution time of a timer |
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593 | * |
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594 | * @param string $name name of the counter |
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595 | * @param bool $unset removes counter from global log |
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596 | * |
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597 | * @return float current execution time of the counter |
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598 | */ |
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599 | public function dumpTime($name = 'XOOPS', $unset = false) |
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600 | { |
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601 | if (!$this->activated) { |
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618 | |||
619 | |||
620 | /** |
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621 | * PSR-3 System is unusable. |
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622 | * |
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623 | * @param string $message message |
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624 | * @param array $context array of additional context |
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625 | * |
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626 | * @return null |
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627 | */ |
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628 | public function emergency($message, array $context = array()) |
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634 | |||
635 | /** |
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636 | * PSR-3 Action must be taken immediately. |
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637 | * |
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638 | * Example: Entire website down, database unavailable, etc. This should |
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639 | * trigger the SMS alerts and wake you up. |
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640 | * |
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641 | * @param string $message message |
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642 | * @param array $context array of additional context |
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643 | * |
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644 | * @return null |
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645 | */ |
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646 | public function alert($message, array $context = array()) |
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652 | |||
653 | /** |
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654 | * PSR-3 Critical conditions. |
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655 | * |
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656 | * Example: Application component unavailable, unexpected exception. |
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657 | * |
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658 | * @param string $message message |
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659 | * @param array $context array of additional context |
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660 | * |
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661 | * @return null |
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662 | */ |
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663 | public function critical($message, array $context = array()) |
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669 | |||
670 | /** |
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671 | * PSR-3 Runtime errors that do not require immediate action but should typically |
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672 | * be logged and monitored. |
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673 | * |
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674 | * @param string $message message |
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675 | * @param array $context array of additional context |
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676 | * |
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677 | * @return null |
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678 | */ |
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679 | public function error($message, array $context = array()) |
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685 | |||
686 | /** |
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687 | * PSR-3 Exceptional occurrences that are not errors. |
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688 | * |
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689 | * Example: Use of deprecated APIs, poor use of an API, undesirable things |
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690 | * that are not necessarily wrong. |
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691 | * |
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692 | * @param string $message message |
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693 | * @param array $context array of additional context |
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694 | * |
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695 | * @return null |
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696 | */ |
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697 | public function warning($message, array $context = array()) |
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703 | |||
704 | /** |
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705 | * PSR-3 Normal but significant events. |
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706 | * |
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707 | * @param string $message message |
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708 | * @param array $context array of additional context |
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709 | * |
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710 | * @return null |
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711 | */ |
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712 | public function notice($message, array $context = array()) |
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718 | |||
719 | /** |
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720 | * PSR-3 Interesting events. |
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721 | * |
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722 | * Example: User logs in, SQL logs. |
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723 | * |
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724 | * @param string $message message |
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725 | * @param array $context array of additional context |
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726 | * |
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727 | * @return null |
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728 | */ |
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729 | public function info($message, array $context = array()) |
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735 | |||
736 | /** |
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737 | * PSR-3 Detailed debug information. |
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738 | * |
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739 | * @param string $message message |
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740 | * @param array $context array of additional context |
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741 | * |
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742 | * @return null |
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743 | */ |
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744 | public function debug($message, array $context = array()) |
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750 | |||
751 | /** |
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752 | * PSR-3 Logs with an arbitrary level. |
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753 | * |
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754 | * @param mixed $level logging level |
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755 | * @param string $message message |
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756 | * @param array $context array of additional context |
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757 | * |
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758 | * @return null |
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759 | */ |
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760 | public function log($level, $message, array $context = array()) |
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768 | } |
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769 |
Our type inference engine has found an assignment to a property that is incompatible with the declared type of that property.
Either this assignment is in error or the assigned type should be added to the documentation/type hint for that property..