记住用户名密码
Gateway/Worker模型 数据库使用示例
1、数据库配置Applications/XXX/Config/Db.php
<?phpnamespace Config;/** * mysql配置 * @author walkor */class Db{ /** * 数据库的一个实例配置,则使用时像下面这样使用 * $user_array = Db::instance(‘user‘)->select(‘name,age‘)->from(‘users‘)->where(‘age>12‘)->query(); * 等价于 * $user_array = Db::instance(‘user‘)->query(‘SELECT `name`,`age` FROM `users` WHERE `age`>12‘); * @var array */ public static $user = array( ‘host‘ => ‘127.0.0.1‘, ‘port‘ => 3306, ‘user‘ => ‘your_user_name‘, ‘password‘ => ‘your_password‘, ‘dbname‘ => ‘user‘, ‘charset‘ => ‘utf8‘, ); }
2、Applications/XXX/Event.php
<?phpuse \GatewayWorker\Lib\Gateway;use \GatewayWorker\Lib\Db;/** * 数据库示例,假设有个user库,里面有个user表 */class Event{ /** * 有消息时触发该方法,根据发来的命令打印2个用户信息 * @param int $client_id 发消息的client_id * @param string $message 消息 * @return void */ public static function onMessage($client_id, $message) { // 发来的消息 $commend = trim($message); if($commend !== ‘get_user_list‘) { Gateway::sendToClient($client_id, "unknown commend\n"); return; } // 获取用户列表(这里是临时的一个测试数据库) $ret = Db::instance(‘user‘)->select(‘*‘)->from(‘users‘)->where(‘uid>3‘)->offset(5)->limit(2)->query(); // 打印结果 return Gateway::sendToClient($client_id, var_export($ret, true)); } }
在Config/Db.php中配置数据库信息,如果有多个数据库,可以在Db.php中配置多个实例 例如下面配置了两个数据库实例
<?phpnamespace Config;class Db{ // 数据库实例1 public static $db1 = array( ‘host‘ => ‘127.0.0.1‘, ‘port‘ => 3306, ‘user‘ => ‘mysql_user‘, ‘password‘ => ‘mysql_password‘, ‘dbname‘ => ‘db1‘, ‘charset‘ => ‘utf8‘, ); // 数据库实例2 public static $db2 = array( ‘host‘ => ‘127.0.0.1‘, ‘port‘ => 3306, ‘user‘ => ‘mysql_user‘, ‘password‘ => ‘mysql_password‘, ‘dbname‘ => ‘db2‘, ‘charset‘ => ‘utf8‘, ); }
use \GatewayWorker\Lib\Db;$db1 = Db::instance(‘db1‘);$db2 = Db::instance(‘db2‘);// 获取所有数据$db1->select(‘ID,Sex‘)->from(‘Persons‘)->where(‘sex= :sex‘)->bindValues(array(‘sex‘=>‘M‘))->query();//等价于$db1->select(‘ID,Sex‘)->from(‘Persons‘)->where("sex= ‘F‘ ")->query();//等价于$db1->query("SELECT ID,Sex FROM `Persons` WHERE sex=‘M’");// 获取一行数据$db1->select(‘ID,Sex‘)->from(‘Persons‘)->where(‘sex= :sex‘)->bindValues(array(‘sex‘=>‘M‘))->row();//等价于$db1->select(‘ID,Sex‘)->from(‘Persons‘)->where("sex= ‘F‘ ")->row();//等价于$db1->row("SELECT ID,Sex FROM `Persons` WHERE sex=‘M’");// 获取一列数据$db1->select(‘ID‘)->from(‘Persons‘)->where(‘sex= :sex‘)->bindValues(array(‘sex‘=>‘M‘))->column();//等价于$db1->select(‘ID‘)->from(‘Persons‘)->where("sex= ‘F‘ ")->column();//等价于$db1->column("SELECT `ID` FROM `Persons` WHERE sex=‘M’");// 获取单个值$db1->select(‘ID,Sex‘)->from(‘Persons‘)->where(‘sex= :sex‘)->bindValues(array(‘sex‘=>‘M‘))->single();//等价于$db1->select(‘ID,Sex‘)->from(‘Persons‘)->where("sex= ‘F‘ ")->single();//等价于$db1->single("SELECT ID,Sex FROM `Persons` WHERE sex=‘M‘");// 复杂查询$db1->select(‘*‘)->from(‘table1‘)->innerJoin(‘table2‘,‘table1.uid = table2.uid‘)->where(‘age > :age‘)->groupBy(array(‘aid‘))->having(‘foo="foo"‘)->orderBy(array(‘did‘))->limit(10)->offset(20)->bindValues(arra y(‘age‘ => 13));// 等价于$db1->query(SELECT * FROM `table1` INNER JOIN `table2` ON `table1`.`uid` = `table2`.`uid` WHERE age > 13 GROUP BY aid HAVING foo="foo" ORDER BY did LIMIT 10 OFFSET 20“);// 插入$insert_id = $db1->insert(‘Persons‘)->cols(array(‘Firstname‘=>‘abc‘, ‘Lastname‘=>‘efg‘, ‘Sex‘=>‘M‘, ‘Age‘=>13))->query(); 等价于$insert_id = $db1->query("INSERT INTO `Persons` ( `Firstname`,`Lastname`,`Sex`,`Age`) VALUES ( ‘abc‘, ‘efg‘, ‘M‘, 13)");// 更新$row_count = $db1->update(‘Persons‘)->cols(array(‘sex‘))->where(‘ID=1‘)->bindValue(‘sex‘, ‘F‘)->query();// 等价于$row_count = $db1->update(‘Persons‘)->cols(array(‘sex‘=>‘F‘))->where(‘ID=1‘)->query();// 等价于$row_count = $db1->query("UPDATE `Persons` SET `sex` = ‘F‘ WHERE ID=1");// 删除$row_count = $db1->delete(‘Persons‘)->where(‘ID=9‘)->query();// 等价于$row_count = $db1->query("DELETE FROM `Persons` WHERE ID=9");
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