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<?php |
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namespace DAL; |
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use \Exception; |
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use \mysqli; |
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use \mysqli_result; |
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use \mysqli_sql_exception; |
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use \mysqli_stmt; |
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use \DAL\Exceptions\DatabaseException; |
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/** |
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* Defines a connection to a database using the mysqli extension. |
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* Broken |
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* |
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* Please use PDO if you are able to. |
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*/ |
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class MySQLDatabase extends AbstractSQLDatabase |
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{ |
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private static function bindToStatement(mysqli_stmt $statement, array $bindings) |
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{ |
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$types = ''; |
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foreach ($bindings as $binding) { |
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if (is_int($binding) || is_long($binding)) { |
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$types .= 'i'; |
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} elseif (is_double($binding) || is_float($binding)) { |
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$types .= 'd'; |
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} elseif (is_string($binding)) { |
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$types .= 's'; |
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} else { |
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$types .= 'b'; |
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} |
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} |
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$arguments = [$types]; |
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foreach ($bindings as &$binding) { |
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$arguments[] =& $binding; |
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} |
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call_user_func_array([$statement, 'bind_param'], $arguments); |
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} |
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private $connection; |
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private $host; |
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private $port; |
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private $username; |
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private $password; |
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private $databaseName; |
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private $options; |
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/** |
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* Initalizes this class, so a connection can be made to the database. If url is not null, the |
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* connection parameters will be decoded from the url. |
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* |
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* The provided url will contain the username, password, hostname, port, and the database name. |
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* Take the following url for example. |
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* |
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* root:[email protected]:3603/administration |
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* |
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* It will connect to mysql.example.com at port 3603. It will use the username root, and use |
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* the password secret. The database is named administration. |
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* Please note that the scheme and fragment will be ignored. |
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* |
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* @param string|null $url |
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*/ |
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public function __construct($url = null) |
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{ |
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if (null !== $url) { |
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if (!filter_var($url, \FILTER_VALIDATE_URL)) { |
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$url = 'mysql://' . $url; |
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} |
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$parsed = parse_url($url); |
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if (isset($parsed['host'])) { |
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$this->host = $parsed['host']; |
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} |
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if (isset($parsed['port'])) { |
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$this->port = $parsed['port']; |
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} |
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if (isset($parsed['user'])) { |
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$this->username = $parsed['user']; |
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} |
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if (isset($parsed['pass'])) { |
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$this->password = $parsed['pass']; |
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} |
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if (isset($parsed['path'])) { |
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$this->databaseName = trim($parsed['path'], '/'); |
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} |
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} |
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if (null === $this->host) { |
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$this->host = 'localhost'; |
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} |
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if (null === $this->username) { |
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$this->username = 'root'; |
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} |
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if (null === $this->password) { |
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$this->password = ''; |
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} |
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if (null === $this->port) { |
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$this->port = 3306; |
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} |
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if (null === $this->databaseName) { |
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$this->databaseName = ''; |
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} |
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$this->options = []; |
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parent::__construct(); |
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} |
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/** |
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* @return mysqli|null |
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*/ |
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public function getConnection() |
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{ |
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$this->initalizeConnection(); |
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return $this->connection; |
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} |
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/** |
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* @return string |
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*/ |
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public function getHost() |
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{ |
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return $this->host; |
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} |
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/** |
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* @param string $value |
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* |
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* @return void |
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*/ |
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public function setHost($value) |
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{ |
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$this->host = $value; |
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} |
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/** |
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* @return int |
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*/ |
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public function getPort() |
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{ |
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return $this->port; |
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} |
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/** |
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* @param int $value |
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* |
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* @return void |
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*/ |
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public function setPort($value) |
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{ |
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$this->port = $value; |
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} |
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/** |
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* @return string |
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*/ |
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public function getUsername() |
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{ |
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return $this->username; |
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} |
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/** |
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* @param string $newUsername |
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*/ |
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public function setUsername($newUsername) |
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{ |
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$this->username = $newUsername; |
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} |
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/** |
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* @return string |
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*/ |
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public function getPassword() |
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{ |
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return $this->password; |
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} |
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/** |
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* @param string $newPassword |
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*/ |
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public function setPassword($newPassword) |
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{ |
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$this->password = $newPassword; |
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} |
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/** |
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* @return string |
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*/ |
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public function getDatabaseName() |
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{ |
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return $this->databaseName; |
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} |
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/** |
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* @param string $databaseName |
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*/ |
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public function setDatabaseName($databaseName) |
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{ |
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$this->databaseName = $databaseName; |
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} |
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/** |
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* @return array |
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*/ |
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public function getAllOptions() |
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{ |
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return $this->options; |
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} |
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/** |
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* @return mixed |
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*/ |
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public function getOption($key) |
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{ |
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return isset($this->options[$key]) ? $this->options[$key] : null; |
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} |
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public function setOption($key, $newOption) |
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{ |
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$this->options[$key] = $newOption; |
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} |
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/** |
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* @return integer |
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*/ |
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public function lastIdCreated() |
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{ |
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return (int) $this->getConnection()->insert_id; |
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} |
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/** |
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* @return array[] |
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*/ |
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private static function processResult(mysqli_result $result) |
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{ |
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$data = []; |
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while (null !== ($row = $result->fetch_assoc())) { |
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$data[] = $row; |
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} |
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$result->free(); |
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return $data; |
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} |
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/** |
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* @param SqlStatementBuilder $statement |
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* @param array $options |
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* @param bool $returnResult |
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* @return array[]|null |
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* |
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* @throws DatabaseException If there was an error connecting to the database. |
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*/ |
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protected function sendQueryToDatabase(SqlStatementBuilder $statement, array $options, $returnResult) |
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{ |
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$compiled = self::compileQueriesAndBindings($statement, $options); |
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$query = $compiled[0]; |
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$bindings = $compiled[1]; |
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$this->initalizeConnection(); |
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if (count($bindings) !== 0) { |
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// We are using prepared statements |
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// Prepare |
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4 |
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$statement = $this->connection->prepare($query); |
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if ($statement === false) { |
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throw $this->logException(new DatabaseException( |
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'Unable to execute query! Error: ' . $this->connection->error |
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)); |
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} |
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// Bind all of the variables |
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self::bindToStatement($statement, $bindings); |
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// Execute |
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if (!$statement->execute()) { |
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$message = 'Unable to execute statement! Error: ' . $this->connection->error; |
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throw $this->logException(new DatabaseException($message)); |
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} |
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4 |
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if (!$returnResult) { |
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return; |
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} |
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// Get result |
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$result = $statement->get_result(); |
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} else { |
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// There are no prepared values to bind. |
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if (!$returnResult) { |
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$this->connection->query($query); |
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return; |
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} |
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$result = $this->connection->query($query); |
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} |
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if (!($result instanceof mysqli_result)) { |
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$message = 'Unable to get result! Error: ' . $this->connection->error; |
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throw $this->logException(new DatabaseException($message)); |
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} |
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return self::processResult($result); |
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} |
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298
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6 |
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private function initalizeConnection() |
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299
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{ |
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300
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6 |
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if ($this->connection === null) { |
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301
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/* Instructs mysqli to throw exceptions instead of using errors. */ |
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6 |
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mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT); |
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try { |
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6 |
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$this->connection = new mysqli( |
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6 |
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$this->host, |
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6 |
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$this->username, |
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6 |
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$this->password, |
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6 |
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$this->databaseName, |
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6 |
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$this->port |
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6 |
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); |
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5 |
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if ($this->connection->connect_errno) { |
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$error = $this->connection->connect_error; |
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$this->connection = null; |
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314
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throw new DatabaseException('Unable to connect to database! Error: ' . $error); |
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315
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} |
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316
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5 |
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foreach ($this->options as $key => $value) { |
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317
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$this->connection->options($key, $value); |
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318
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5 |
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} |
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319
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6 |
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} catch (mysqli_sql_exception $e) { |
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320
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1 |
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throw $this->logException( |
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321
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1 |
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new DatabaseException( |
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322
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1 |
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'Error while connecting to the database!', |
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323
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1 |
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0, |
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324
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$e |
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325
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1 |
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) |
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326
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1 |
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); |
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327
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} |
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328
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5 |
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} |
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329
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5 |
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} |
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330
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} |
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331
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