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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| 15 | class Database |
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| 16 | { |
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| 17 | /** @var \PDO Database driver */ |
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| 18 | protected $driver; |
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| 19 | |||
| 20 | /** @var string Database name */ |
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| 21 | protected $database; |
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| 22 | |||
| 23 | /** @var int Amount of milliseconds spent on queries */ |
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| 24 | protected $elapsed; |
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| 25 | |||
| 26 | /** @var int Amount queries executed */ |
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| 27 | protected $count; |
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| 28 | |||
| 29 | /** |
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| 30 | * Connect to a database using driver with parameters |
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| 31 | * @param string $database Database name |
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| 32 | * @param string $username Database username |
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| 33 | * @param string $password Database password |
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| 34 | * @param string $host Database host(localhost by default) |
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| 35 | * @param int $port Database port(3306 by default) |
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| 36 | * @param string $driver Database driver for interaction(MySQL by default) |
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| 37 | * @param string $charset Database character set |
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| 38 | * @return bool True if connection to database was successful |
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| 39 | */ |
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| 40 | public function connect( |
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| 62 | |||
| 63 | /** |
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| 64 | * Get database name |
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| 65 | * @return string |
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| 66 | */ |
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| 67 | public function database() |
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| 71 | |||
| 72 | /** |
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| 73 | * Create new database record |
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| 74 | * @param string $entity Entity class name |
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| 75 | * @return null|RecordInterface Entity instance |
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| 76 | * @throws EntityNotFound |
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| 77 | */ |
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| 78 | public function entity($entity) |
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| 86 | |||
| 87 | /** |
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| 88 | * Get entity query manager |
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| 89 | * @param string $entity Entity identifier |
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| 90 | * @return Query Query manager instance |
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| 91 | */ |
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| 92 | public function manager($entity) |
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| 96 | |||
| 97 | /** |
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| 98 | * High-level database query executor |
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| 99 | * @param string $sql SQL statement |
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| 100 | * @return mixed Database query result |
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| 101 | */ |
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| 102 | View Code Duplication | public function &query($sql) |
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| 103 | { |
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| 104 | $result = array(); |
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| 105 | |||
| 106 | if (isset($this->driver)) { |
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| 107 | // Store timestamp |
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| 108 | $tsLast = microtime(true); |
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| 109 | |||
| 110 | try { |
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| 111 | // Perform database query |
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| 112 | $result = $this->driver->prepare($sql)->execute(); |
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| 113 | } catch (\PDOException $e) { |
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| 114 | echo("\n" . $sql . '-' . $e->getMessage()); |
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| 115 | } |
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| 116 | |||
| 117 | // Store queries count |
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| 118 | $this->count++; |
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| 119 | |||
| 120 | // Count elapsed time |
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| 121 | $this->elapsed += microtime(true) - $tsLast; |
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| 122 | } |
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| 123 | |||
| 124 | return $result; |
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| 125 | } |
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| 126 | |||
| 127 | /** |
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| 128 | * Retrieve array of records from a database, if $className is passed method |
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| 129 | * will try to create an object of that type. If request has failed than |
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| 130 | * method will return empty array of stdClass all arrays regarding to $className is |
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| 131 | * passed or not. |
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| 132 | * |
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| 133 | * @param string $sql Query text |
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| 134 | * @param string $className Class name if we want to create object |
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| 135 | * @return array Collection of arrays or objects |
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| 136 | */ |
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| 137 | View Code Duplication | public function &fetch($sql, $className = null) |
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| 166 | |||
| 167 | /** |
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| 168 | * Special accelerated function to retrieve db record fields instead of objects |
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| 169 | * |
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| 170 | * @param string $className |
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| 171 | * @param mixed $query |
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| 172 | * @param string $field |
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| 173 | * |
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| 174 | * @return array |
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| 175 | */ |
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| 176 | public function &fetchColumn($className, $query, $field) |
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| 206 | |||
| 207 | /** |
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| 208 | * Retrieve one record from a database, if $className is passed method |
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| 209 | * will try to create an object of that type. If request has failed than |
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| 210 | * method will return empty array or stdClass regarding to $className is |
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| 211 | * passed or not. |
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| 212 | * |
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| 213 | * @param string $sql Query text |
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| 214 | * @param string $className Class name if we want to create object |
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| 215 | * @return array|object Record as array or object |
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| 216 | */ |
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| 217 | View Code Duplication | public function &fetchOne($sql, $className = null) |
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| 247 | |||
| 248 | public function create($className, &$object = null) |
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| 261 | |||
| 262 | public function update($className, &$object) |
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| 269 | |||
| 270 | public function delete($className, &$object) |
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| 276 | |||
| 277 | /** Count query result */ |
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| 278 | public function count($className, $query) |
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| 288 | |||
| 289 | /** |
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| 290 | * Выполнить защиту значения поля для его безопасного использования в запросах |
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| 291 | * |
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| 292 | * @param string $value Значения поля для запроса |
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| 293 | * @return string $value Безопасное представление значения поля для запроса |
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| 294 | */ |
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| 295 | protected function protectQueryValue($value) |
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| 308 | |||
| 309 | /** |
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| 310 | * Prepare create & update SQL statements fields |
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| 311 | * @param string $className Entity name |
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| 312 | * @param Record $object Database object to get values(if needed) |
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| 313 | * @param bool $straight Way of forming SQL field statements |
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| 314 | * @return array Collection of key => value with SQL fields statements |
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| 315 | */ |
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| 316 | protected function &getQueryFields($className, & $object = null, $straight = false) |
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| 346 | |||
| 347 | /** @deprecated Use query() */ |
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| 348 | public function &simple_query($sql) |
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| 352 | } |
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| 353 |
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..