ThinkPHP5.1框架数据库链接和增删改查操作示例_php实例_

where('id','29') ->value('title'); } //2、动态配置 think\db\Query.php中有一个方法connect() public function dbTest2() { return Db::connect([ 'type'=>'mysql', 'hostname'=>'localhost', 'database'=>'top789', 'username'=>'root', 'password'=>'root', ]) ->table('pzq_article') ->where('id','76') ->value('title'); } //3、DSN连接 public function dbTest3() { $dsn = 'mysql://root:root@localhost:3306/top789#utf8'; return Db::connect($dsn) ->table('pzq_article') ->where('id','88') ->value('title'); } //4、单条查旬 public function dbTest4() { $res = Db::table('pzq_article') ->field(['title'=>'标题','id'=>'编号'])//可添加别名 ->where('id','=',20)//如果是等号，=可以省略 ->find();//如果是主键查询，可省略上面where,这行写->find(20); dump(is_null($res)?'没有查到':$res); } //5、多条查旬 public function dbTest5() { $res = Db::table('pzq_article') ->field(['id','cat_id','title']) ->where([ ['id','>',20], ['cat_id','=',2], ])//一个条件，直接用表达式->where('id','>',20)。多个条件用数组 ->order('id desc')->limit(3)->select(); if(empty($res)){ return '没有查到'; }else{ dump($res); } } //6、数据添加 public function dbTest6() { $data = [ 'name'=>'Sam2', 'age'=>'29', 'posttime'=>time() ]; $dataall=[ ['name'=>'Sam3','age'=>'29','posttime'=>time()], ['name'=>'Sam4','age'=>'30','posttime'=>time()], ]; //(1)单条插入 //return Db::table('test')->data($data)->insert(); //(2)插入同时返回新增主键id //return Db::table('test')->insertGetId($data); //(3)插入多条数据 return Db::table('test')->data($dataall)->insertAll(); } //更新数据 public function dbTest7() { // return Db::table('test') // ->where('id','=',4) // ->update(['name'=>'SamC','age'=>'31']); //如果where条件是主键，还可以如下使用 return Db::table('test') ->update(['name'=>'SamCheng','age'=>'30','id'=>4]); } //删除操作 public function dbTest8() { //return Db::table('test')->delete(6); //或者 return Db::table('test')->where('id',5)->delete(); } //mysql原生语句 查询 public function dbTest9() { $sql = "select name,age from test where id>2"; dump(Db::query($sql)); } //mysql 增、删、改 用Db::execute($sql) public function dbTest10() { //$sql = "update test set name='samC' where id=4"; //$sql = "insert test set name='Yan',age='30'"; $sql = "delete from test where id=4"; return Db::execute($sql); } }