ThinkPHP5.1框架数据库链接和增删改查操作示例

<?php
namespace appindexcontroller;
use thinkDb;
class Demo
{
//1、全局配置 config/database.php配置
public function dbTest()
{
return Db::table('pzq_article')
- where('id','29')
- value('title');
}
//2、动态配置 thinkdbQuery.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);
}
}