1. Design the database table
For example, I created a new database table named test
Second, configure the database connection information
-
local test
Modify directly in .env instead of modifying in config/database.php
-
Formal environment
Three, add, delete, modify and check
-
Import Db library
use think\facade\Db;Suppose the newly added controller path is
app\test\controller\CURD.php
2. increase
// 增public function insert(){$data = ['name' => 'lili', 'age' => 18];$result = Db::name('test')->insert($data);var_dump($result);}
Db::name('test') where 'test' is the name of the database table, using the insert operation, returns the number of successfully inserted items, usually returns 1
3. Check
// 查public function select(){// 查所有$result = Db::name('test')->select()->toArray();print_r($result);print_r('<br/>');print_r('<br/>');// 查一个 （多个条件用多个where)$result = Db::name('test')->where('name', 'lili')->where('age', '>', 3)->select()->toArray();var_dump($result);}
-
The query uses select(), which returns an object, so use ->toArray() to convert it into an array
-
The query condition uses where('field name','query expression','query condition'), and the default 'query expression' means equal to
-
Multiple where can be connected
4. change
// 改public function update(){$result = Db::name('test')->where('name', 'lili')->update(['age' => 20]);var_dump($result);}
Use update to return the number of affected data, and return 0 if no data has been modified
5. delete
// 删public function delete(){$result = Db::name('test')->where('name', 'lili')->delete();var_dump($result);}
Use delete to return the number of items that affect the data, and return 0 if not deleted
4. Detailed tutorial
https://www.kancloud.cn/manual/thinkphp6_0/1037533
Software engineering classmate Xiao Shi
2023.08.30