'.$e->getMessage().'
'; exit; } } public function __destruct() { //切斷跟資料庫的連接 $this->dbConn = null; } /** * 這段用來執行 MYSQL 資料庫的語法，可以靈活使用 */ public function execute($sql = null, $data_array): array { try { $stmt = $this->dbConn->prepare($sql); $stmt->execute($data_array); return $stmt->fetchAll(PDO::FETCH_ASSOC); } catch(PDOException $e) { $this->error_message = ''.$e->getMessage().'
'; } } /** * 這段用來讀取資料庫中的資料，回傳的是陣列資料 */ public function queryDB($table, $condition, $order_by, $fields, $limit, $data_array){ if(!isset($data_array) OR count($data_array) == 0)return false; if(empty($table))return false; if(is_numeric($limit))$limit = "LIMIT ".$limit; if(empty($condition))$condition = 1; if(empty($order_by))$order_by = 1; if(empty($fields))$fields = "*"; $this->last_sql = "SELECT {$fields} FROM {$table} WHERE {$condition} ORDER BY {$order_by} {$limit}"; try { $stmt = $this->dbConn->prepare($this->last_sql); $stmt->execute($data_array); return $stmt->fetchAll(); } catch(PDOException $e) { $this->error_message = ''.$e->getMessage().'
'; } } /** * 這段可以新增資料庫中的資料，並把最後一筆的 ID 存到變數中，可以用 getLastId() 取出 */ public function insert($table = null, $data_array = array()) { if($table===null)return false; if(count($data_array) == 0) return false; $tmp_col = array(); $tmp_dat = array(); foreach ($data_array as $key => $value) { $tmp_col[] = $key; $tmp_dat[] = ":$key"; $prepare_array[":".$key] = $value; } $columns = join(",", $tmp_col); $data = join(",", $tmp_dat); $this->last_sql = "INSERT INTO " . $table . "(" . $columns . ")VALUES(" . $data . ")"; $stmt = $this->dbConn->prepare($this->last_sql); $stmt->execute($prepare_array); $this->last_id = $this->dbConn->lastInsertId(); } /** * 這段可以更新資料庫中的資料 */ public function update($table = null, $data_array = null, $key_column = null, $id = null) { if($table == null)return false; if($id == null) return false; if($key_column == null) return false; if(count($data_array) == 0) return false; $settingArr = array(); foreach( $data_array as $key=>$val ){ $settingArr[]= $key . "=" . ':'.$key; } $setting_list = implode(",", $settingArr); $data_array[$key_column] = $id; $this->last_sql = "UPDATE " . $table . " SET " . $setting_list . " WHERE " . $key_column . " = " . ":".$key_column; $stmt = $this->dbConn->prepare($this->last_sql); $stmt->execute($data_array); return true; } /** * 這段可以刪除資料庫中的資料 */ public function delete($table = null, $key_column = null, $id = null) { if ($table===null) return false; if($id===null) return false; if($key_column===null) return false; $this->last_sql = "DELETE FROM $table WHERE " . $key_column . " = " . ':'.$key_column; $stmt = $this->dbConn->prepare($this->last_sql); $stmt->execute(array( ':'.$key_column => $id)); return true; } /** * begin transaction * * @return bool */ public function transaction(): bool { if ( $this->hasActiveTransaction ) { return false; } else { $this->hasActiveTransaction = $this->dbConn->beginTransaction(); return $this->hasActiveTransaction; } } /** * commit query * * @return void */ public function commitDB(){ $this->dbConn->commit(); $this->hasActiveTransaction = false; } /** * rollback query * * @return void */ public function rollbackDB(){ $this->dbConn->rollback(); $this->hasActiveTransaction = false; } /** * @return string * 這段會把最後執行的語法回傳給你 */ public function getLastSql() { return $this->last_sql; } /** * @param string $last_sql * 這段是把執行的語法存到變數裡，設定成 private 只有內部可以使用，外部無法呼叫 */ private function setLastSql($last_sql) { $this->last_sql = $last_sql; } /** * @return int * 主要功能是把新增的 ID 傳到物件外面 */ public function getLastId() { $this->last_id = $this->dbConn->lastInsertId(); return $this->last_id; } /** * @param int $last_id * 把這個 $last_id 存到物件內的變數 */ private function setLastId($last_id) { $this->last_id = $last_id; } /** * @return int */ public function getLastNumRows() { return $this->last_num_rows; } /** * close database connection * * @return void */ public function closeDB(){ $this->dbConn = null; } /** * @param int $last_num_rows */ private function setLastNumRows($last_num_rows) { $this->last_num_rows = $last_num_rows; } /** * @return string * 取出物件內的錯誤訊息 */ public function getErrorMessage() { return $this->error_message; } /** * @param string $error_message * 記下錯誤訊息到物件變數內 */ private function setErrorMessage($error_message) { $this->error_message = $error_message; } }