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- <?php
- /**
- * @copyright (C)2016-2099 Hnaoyun Inc.
- * @author XingMeng
- * @email hnxsh@foxmail.com
- * @date 2017年8月23日
- * 数据库Sqlite驱动 ,写入数据时自动启用事务
- */
- namespace core\database;
-
- use core\basic\Config;
-
- class Sqlite implements Builder
- {
-
- protected static $sqlite;
-
- protected $master;
-
- protected $slave;
-
- private $begin = false;
-
- private function __construct()
- {}
-
- public function __destruct()
- {
- if ($this->begin) { // 存在待提交的事务时自动进行提交
- $this->master->exec('commit;');
- }
- }
-
- // 获取单一实例,使用单一实例数据库连接类
- public static function getInstance()
- {
- if (! self::$sqlite) {
- self::$sqlite = new self();
- }
- return self::$sqlite;
- }
-
- // 连接数据库,接受数据库连接参数,返回数据库连接对象
- public function conn($cfg)
- {
- if (extension_loaded('SQLite3')) {
- try {
- $conn = new \SQLite3($cfg);
- $conn->busyTimeout(15 * 1000); // 设置繁忙延迟时间
- } catch (\Exception $e) {
- error("读取数据库文件失败:" . iconv('gbk', 'utf-8', $e->getMessage()));
- }
- } else {
- if (extension_loaded('pdo_sqlite')) {
- error('未检测到您服务器环境的sqlite3数据库扩展,请检查php.ini中是否已经开启该扩展!<br>另外,检测到您服务器支持pdo_sqlite扩展,您也可以修改数据库配置连接驱动为pdo_sqlite试试!');
- } else {
- error('未检测到您服务器环境的sqlite3数据库扩展,请检查php.ini中是否已经开启该扩展!');
- }
- }
- return $conn;
- }
-
- // 执行SQL语句,接受完整SQL语句,返回结果集对象
- public function query($sql, $type = 'master')
- {
- $time_s = microtime(true);
- if (! $this->master || ! $this->slave) {
- $cfg = ROOT_PATH . Config::get('database.dbname');
- $conn = $this->conn($cfg);
- $this->master = $conn;
- $this->slave = $conn;
- }
- switch ($type) {
- case 'master':
- if (! $this->begin) { // 存在写入时自动开启显式事务,提高写入性能
- $this->master->exec('begin;');
- $this->begin = true;
- }
- $result = $this->master->exec($sql) or $this->error($sql, 'master');
- break;
- case 'slave':
- $result = $this->slave->query($sql) or $this->error($sql, 'slave');
- break;
- }
- return $result;
- }
-
- // 数据是否存在模型,接受完整SQL语句,返回boolean数据
- public function isExist($sql)
- {
- $result = $this->query($sql, 'slave');
- if ($result->fetchArray()) {
- $result->finalize();
- return true;
- } else {
- return false;
- }
- }
-
- // 获取记录总量模型,接受数据库表名,返回int数据
- public function rows($table)
- {
- $sql = "SELECT count(*) FROM $table";
- $result = $this->query($sql, 'slave');
- if (! ! $row = $result->fetchArray(2)) {
- $result->finalize();
- return $row[0];
- } else {
- return 0;
- }
- }
-
- // 读取字段数量模型,接受数据库表名,返回int数据
- public function fields($table)
- {
- $sql = "SELECT * FROM $table LIMIT 1";
- $result = $this->query($sql, 'slave');
- if ($result) {
- return $result->numColumns();
- } else {
- return false;
- }
- }
-
- /**
- * 获取表字段,接受数据库表名,返回表字段数组
- *
- * @param $table 表名
- */
- public function tableFields($table)
- {
- $sql = "pragma table_info($table)";
- $result = $this->query($sql, 'slave');
- $rows = array();
- while (! ! $row = $result->fetchArray(SQLITE3_ASSOC)) {
- $rows[] = $row['name'];
- }
- $result->finalize();
- return $rows;
- }
-
- // 查询一条数据模型,接受完整SQL语句,有数据返回对象数组,否则空数组
- public function one($sql, $type = null)
- {
- if (! $type) {
- $my_type = SQLITE3_ASSOC;
- } else {
- $my_type = $type;
- }
- $row = array();
- $result = $this->query($sql, 'slave');
- if (! ! $row = $result->fetchArray($my_type)) {
- if (! $type && $row) {
- $out = new \stdClass();
- foreach ($row as $key => $value) {
- $out->$key = $value;
- }
- $row = $out;
- }
- $result->finalize();
- }
- return $row;
- }
-
- // 查询多条数据模型,接受完整SQL语句,有数据返回二维对象数组,否则空数组
- public function all($sql, $type = null)
- {
- if (! $type) {
- $my_type = SQLITE3_ASSOC;
- } else {
- $my_type = $type;
- }
- $result = $this->query($sql, 'slave');
- $rows = array();
- while (! ! $row = $result->fetchArray($my_type)) {
- if (! $type && $row) {
- $out = new \stdClass();
- foreach ($row as $key => $value) {
- $out->$key = $value;
- }
- $row = $out;
- }
- $rows[] = $row;
- }
- $result->finalize();
- return $rows;
- }
-
- // 数据增、删、改模型,接受完整SQL语句,返回影响的行数的int数据
- public function amd($sql)
- {
- $result = $this->query($sql, 'master');
- if ($result) {
- return $result;
- } else {
- return 0;
- }
- }
-
- // 最近一次插入数据的自增字段值,返回int数据
- public function insertId()
- {
- return $this->master->lastInsertRowID();
- }
-
- // 执行多条SQL模型,成功返回true,否则false
- public function multi($sql)
- {
- $sqls = explode(';', $sql);
- foreach ($sqls as $key => $value) {
- $result = $this->query($value, 'master');
- }
- if ($result) {
- return true;
- } else {
- return false;
- }
- }
-
- // 显示执行错误
- protected function error($sql, $conn)
- {
- $err = '错误:' . $this->$conn->lastErrorMsg();
- if ($this->begin) { // 存在显式开启事务时进行回滚
- $this->master->exec('rollback;');
- $this->begin = false;
- }
- // error('执行SQL发生错误!' . $err . '语句:' . $sql);
- error('执行SQL发生错误!' . $err);
- }
- }
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